diff --git a/src/book/mod.rs b/src/book/mod.rs
index 6651a82..7e9f77f 100644
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -37,7 +37,7 @@ impl<'book> AddressRange<'book> {
         for ri in row_range.iter() {
             let mut row = Vec::with_capacity(col_range.len());
             for ci in col_range.iter() {
-                row.push(Address { row: *ri, col: *ci });
+                row.push(Address { sheet: self.start.sheet, row: *ri, col: *ci });
             }
             rows.push(row);
         }
@@ -49,7 +49,7 @@ impl<'book> AddressRange<'book> {
         let mut rows = Vec::with_capacity(row_range.len() * col_range.len());
         for ri in row_range.iter() {
             for ci in col_range.iter() {
-                rows.push(Address { row: *ri, col: *ci });
+                rows.push(Address { sheet: self.start.sheet, row: *ri, col: *ci });
             }
         }
         rows
@@ -85,7 +85,6 @@ impl<'book> AddressRange<'book> {
 /// A spreadsheet book with some internal state tracking.
 pub struct Book {
     pub(crate) model: UserModel,
-    pub current_sheet: u32,
     pub location: crate::ui::Address,
 }
 
@@ -94,7 +93,6 @@ impl Book {
     pub fn new(model: UserModel) -> Self {
         Self {
             model,
-            current_sheet: 0,
             location: Address::default(),
         }
     }
@@ -162,7 +160,7 @@ impl Book {
             self.set_sheet_name(idx, name)?;
         }
         self.model
-            .set_selected_sheet(self.current_sheet)
+            .set_selected_sheet(self.location.sheet)
             .map_err(|e| anyhow!(e))?;
         Ok(())
     }
@@ -173,7 +171,7 @@ impl Book {
     }
 
     /// Move to a specific sheet location in the current sheet
-    pub fn move_to(&mut self, Address { row, col }: &Address) -> Result<()> {
+    pub fn move_to(&mut self, Address { sheet: _, row, col }: &Address) -> Result<()> {
         // FIXME(zaphar): Check that this is safe first.
         self.location.row = *row;
         self.location.col = *col;
@@ -194,7 +192,7 @@ impl Book {
                 .model
                 .get_model()
                 .extend_to(
-                    self.current_sheet,
+                    self.location.sheet,
                     from.row as i32,
                     from.col as i32,
                     cell.row as i32,
@@ -203,7 +201,7 @@ impl Book {
                 .map_err(|e| anyhow!(e))?;
             self.model
                 .set_user_input(
-                    self.current_sheet,
+                    self.location.sheet,
                     cell.row as i32,
                     cell.col as i32,
                     &contents,
@@ -215,14 +213,14 @@ impl Book {
     }
 
     pub fn clear_current_cell(&mut self) -> Result<()> {
-        self.clear_cell_contents(self.current_sheet as u32, self.location.clone())
+        self.clear_cell_contents(self.location.clone())
     }
 
     pub fn clear_current_cell_all(&mut self) -> Result<()> {
-        self.clear_cell_all(self.current_sheet as u32, self.location.clone())
+        self.clear_cell_all(self.location.clone())
     }
 
-    pub fn clear_cell_contents(&mut self, sheet: u32, Address { row, col }: Address) -> Result<()> {
+    pub fn clear_cell_contents(&mut self, Address { sheet, row, col }: Address) -> Result<()> {
         Ok(self
             .model
             .range_clear_contents(&Area {
@@ -235,15 +233,15 @@ impl Book {
             .map_err(|s| anyhow!("Unable to clear cell contents {}", s))?)
     }
 
-    pub fn clear_cell_range(&mut self, sheet: u32, start: Address, end: Address) -> Result<()> {
-        let area = calculate_area(sheet, &start, &end);
+    pub fn clear_cell_range(&mut self, start: Address, end: Address) -> Result<()> {
+        let area = calculate_area(start.sheet, &start, &end);
         self.model
             .range_clear_contents(&area)
             .map_err(|s| anyhow!("Unable to clear cell contents {}", s))?;
         Ok(())
     }
 
-    pub fn clear_cell_all(&mut self, sheet: u32, Address { row, col }: Address) -> Result<()> {
+    pub fn clear_cell_all(&mut self, Address { sheet, row, col }: Address) -> Result<()> {
         Ok(self
             .model
             .range_clear_all(&Area {
@@ -256,8 +254,8 @@ impl Book {
             .map_err(|s| anyhow!("Unable to clear cell contents {}", s))?)
     }
 
-    pub fn clear_cell_range_all(&mut self, sheet: u32, start: Address, end: Address) -> Result<()> {
-        let area = calculate_area(sheet, &start, &end);
+    pub fn clear_cell_range_all(&mut self, start: Address, end: Address) -> Result<()> {
+        let area = calculate_area(start.sheet, &start, &end);
         self.model
             .range_clear_all(&area)
             .map_err(|s| anyhow!("Unable to clear cell contents {}", s))?;
@@ -269,13 +267,13 @@ impl Book {
         Ok(self.get_cell_addr_rendered(&self.location)?)
     }
 
-    pub fn get_cell_style(&self, sheet: u32, cell: &Address) -> Option<Style> {
+    pub fn get_cell_style(&self, cell: &Address) -> Option<Style> {
         // TODO(jwall): This is modeled a little weird. We should probably record
         // the error *somewhere* but for the user there is nothing to be done except
         // not use a style.
         match self
             .model
-            .get_cell_style(sheet, cell.row as i32, cell.col as i32)
+            .get_cell_style(cell.sheet, cell.row as i32, cell.col as i32)
         {
             Err(_) => None,
             Ok(s) => Some(s),
@@ -383,18 +381,18 @@ impl Book {
     }
 
     /// Get a cells rendered content for display.
-    pub fn get_cell_addr_rendered(&self, Address { row, col }: &Address) -> Result<String> {
+    pub fn get_cell_addr_rendered(&self, Address { sheet, row, col }: &Address) -> Result<String> {
         Ok(self
             .model
-            .get_formatted_cell_value(self.current_sheet, *row as i32, *col as i32)
+            .get_formatted_cell_value(*sheet, *row as i32, *col as i32)
             .map_err(|s| anyhow!("Unable to format cell {}", s))?)
     }
 
     /// Get a cells actual content unformatted as a string.
-    pub fn get_cell_addr_contents(&self, Address { row, col }: &Address) -> Result<String> {
+    pub fn get_cell_addr_contents(&self, Address { sheet, row, col }: &Address) -> Result<String> {
         Ok(self
             .model
-            .get_cell_content(self.current_sheet, *row as i32, *col as i32)
+            .get_cell_content(*sheet, *row as i32, *col as i32)
             .map_err(|s| anyhow!("Unable to format cell {}", s))?)
     }
 
@@ -403,7 +401,7 @@ impl Book {
         Ok(self
             .model
             .get_cell_content(
-                self.current_sheet,
+                self.location.sheet,
                 self.location.row as i32,
                 self.location.col as i32,
             )
@@ -422,7 +420,7 @@ impl Book {
     pub fn update_cell<S: AsRef<str>>(&mut self, location: &Address, value: S) -> Result<()> {
         self.model
             .set_user_input(
-                self.current_sheet,
+                location.sheet,
                 location.row as i32,
                 location.col as i32,
                 // TODO(jwall): This could probably be made more efficient
@@ -436,11 +434,12 @@ impl Book {
     pub fn insert_rows(&mut self, row_idx: usize, count: usize) -> Result<()> {
         for i in 0..count {
             self.model
-                .insert_row(self.current_sheet, (row_idx + i) as i32)
+                .insert_row(self.location.sheet, (row_idx + i) as i32)
                 .map_err(|e| anyhow!("Unable to insert row(s): {}", e))?;
         }
         if self.location.row >= row_idx {
             self.move_to(&Address {
+                sheet: self.location.sheet,
                 row: self.location.row + count,
                 col: self.location.col,
             })?;
@@ -452,11 +451,12 @@ impl Book {
     pub fn insert_columns(&mut self, col_idx: usize, count: usize) -> Result<()> {
         for i in 0..count {
             self.model
-                .insert_column(self.current_sheet, (col_idx + i) as i32)
+                .insert_column(self.location.sheet, (col_idx + i) as i32)
                 .map_err(|e| anyhow!("Unable to insert column(s): {}", e))?;
         }
         if self.location.col >= col_idx {
             self.move_to(&Address {
+                sheet: self.location.sheet,
                 row: self.location.row,
                 col: self.location.col + count,
             })?;
@@ -471,7 +471,7 @@ impl Book {
 
     /// Get column size
     pub fn get_col_size(&self, idx: usize) -> Result<usize> {
-        self.get_column_size_for_sheet(self.current_sheet, idx)
+        self.get_column_size_for_sheet(self.location.sheet, idx)
     }
 
     pub fn get_column_size_for_sheet(
@@ -487,7 +487,7 @@ impl Book {
     }
 
     pub fn set_col_size(&mut self, col: usize, width: usize) -> Result<()> {
-        self.set_column_size_for_sheet(self.current_sheet, col, width)
+        self.set_column_size_for_sheet(self.location.sheet, col, width)
     }
 
     pub fn set_column_size_for_sheet(
@@ -527,7 +527,7 @@ impl Book {
             .enumerate()
             .find(|(_idx, sheet)| sheet.name == name)
         {
-            self.current_sheet = idx as u32;
+            self.location.sheet = idx as u32;
             return true;
         }
         false
@@ -540,27 +540,27 @@ impl Book {
 
     pub fn select_next_sheet(&mut self) {
         let len = self.model.get_model().workbook.worksheets.len() as u32;
-        let mut next = self.current_sheet + 1;
+        let mut next = self.location.sheet + 1;
         if next == len {
             next = 0;
         }
         self.model
             .set_selected_sheet(next)
             .expect("Unexpected error selecting sheet");
-        self.current_sheet = next;
+        self.location.sheet = next;
     }
 
     pub fn select_prev_sheet(&mut self) {
         let len = self.model.get_model().workbook.worksheets.len() as u32;
-        let next = if self.current_sheet == 0 {
+        let next = if self.location.sheet == 0 {
             len - 1
         } else {
-            self.current_sheet - 1
+            self.location.sheet - 1
         };
         self.model
             .set_selected_sheet(next)
             .expect("Unexpected error selecting sheet");
-        self.current_sheet = next;
+        self.location.sheet = next;
     }
 
     /// Select a sheet by id.
@@ -577,7 +577,7 @@ impl Book {
             self.model
                 .set_selected_sheet(idx as u32)
                 .expect("Unexpected error selecting sheet");
-            self.current_sheet = idx as u32;
+            self.location.sheet = idx as u32;
             return true;
         }
         false
@@ -592,8 +592,8 @@ impl Book {
             .model
             .get_model()
             .workbook
-            .worksheet(self.current_sheet)
-            .map_err(|s| anyhow!("Invalid Worksheet id: {}: error: {}", self.current_sheet, s))?)
+            .worksheet(self.location.sheet)
+            .map_err(|s| anyhow!("Invalid Worksheet id: {}: error: {}", self.location.sheet, s))?)
     }
 
     pub(crate) fn get_sheet_name_by_idx(&self, idx: usize) -> Result<&str> {
@@ -625,7 +625,7 @@ impl Default for Book {
     fn default() -> Self {
         let mut book =
             Book::new(UserModel::new_empty("default_name", "en", "America/New_York").unwrap());
-        book.update_cell(&Address { row: 1, col: 1 }, "").unwrap();
+        book.update_cell(&Address { sheet: 0, row: 1, col: 1 }, "").unwrap();
         book
     }
 }
diff --git a/src/book/test.rs b/src/book/test.rs
index f1cf22d..e3dfaf7 100644
--- a/src/book/test.rs
+++ b/src/book/test.rs
@@ -36,7 +36,7 @@ fn test_book_default() {
 #[test]
 fn test_book_insert_cell_new_row() {
     let mut book = Book::default();
-    book.update_cell(&Address { row: 2, col: 1 }, "1")
+    book.update_cell(&Address { sheet: 0, row: 2, col: 1 }, "1")
         .expect("failed to edit cell");
     book.evaluate();
     let WorksheetDimension {
@@ -52,7 +52,7 @@ fn test_book_insert_cell_new_row() {
 #[test]
 fn test_book_insert_cell_new_column() {
     let mut book = Book::default();
-    book.update_cell(&Address { row: 1, col: 2 }, "1")
+    book.update_cell(&Address { sheet: 0, row: 1, col: 2 }, "1")
         .expect("failed to edit cell");
     let WorksheetDimension {
         min_row,
@@ -67,14 +67,14 @@ fn test_book_insert_cell_new_column() {
 #[test]
 fn test_book_insert_rows() {
     let mut book = Book::default();
-    book.update_cell(&Address { row: 2, col: 2 }, "1")
+    book.update_cell(&Address { sheet: 0, row: 2, col: 2 }, "1")
         .expect("failed to edit cell");
-    book.move_to(&Address { row: 2, col: 2 })
+    book.move_to(&Address { sheet: 0, row: 2, col: 2 })
         .expect("Failed to move to location");
     assert_eq!((2, 2), book.get_size().expect("Failed to get size"));
     book.insert_rows(1, 5).expect("Failed to insert rows");
     assert_eq!((7, 2), book.get_size().expect("Failed to get size"));
-    assert_eq!(Address { row: 7, col: 2 }, book.location);
+    assert_eq!(Address { sheet: 0, row: 7, col: 2 }, book.location);
     assert_eq!(
         "1",
         book.get_current_cell_rendered()
@@ -85,14 +85,14 @@ fn test_book_insert_rows() {
 #[test]
 fn test_book_insert_columns() {
     let mut book = Book::default();
-    book.update_cell(&Address { row: 2, col: 2 }, "1")
+    book.update_cell(&Address { sheet: 0, row: 2, col: 2 }, "1")
         .expect("failed to edit cell");
-    book.move_to(&Address { row: 2, col: 2 })
+    book.move_to(&Address { sheet: 0, row: 2, col: 2 })
         .expect("Failed to move to location");
     assert_eq!((2, 2), book.get_size().expect("Failed to get size"));
     book.insert_columns(1, 5).expect("Failed to insert rows");
     assert_eq!((2, 7), book.get_size().expect("Failed to get size"));
-    assert_eq!(Address { row: 2, col: 7 }, book.location);
+    assert_eq!(Address { sheet: 0, row: 2, col: 7 }, book.location);
     assert_eq!(
         "1",
         book.get_current_cell_rendered()
@@ -103,7 +103,7 @@ fn test_book_insert_columns() {
 #[test]
 fn test_book_col_size() {
     let mut book = Book::default();
-    book.update_cell(&Address { row: 2, col: 2 }, "1")
+    book.update_cell(&Address { sheet: 0, row: 2, col: 2 }, "1")
         .expect("failed to edit cell");
     book.set_col_size(1, 20).expect("Failed to set column size");
     assert_eq!(20, book.get_col_size(1).expect("Failed to get column size"));
diff --git a/src/ui/mod.rs b/src/ui/mod.rs
index 662426d..b4dcc40 100644
--- a/src/ui/mod.rs
+++ b/src/ui/mod.rs
@@ -45,10 +45,12 @@ impl RangeSelection {
         if let (Some(start), Some(end)) = (&self.start, &self.end) {
             return Some((
                 Address {
+                    sheet: start.sheet,
                     row: std::cmp::min(start.row, end.row),
                     col: std::cmp::min(start.col, end.col),
                 },
                 Address {
+                    sheet: end.sheet,
                     row: std::cmp::max(start.row, end.row),
                     col: std::cmp::max(start.col, end.col),
                 },
@@ -133,13 +135,14 @@ impl<'ws> AppState<'ws> {
 /// The Address in a Table.
 #[derive(Debug, PartialEq, PartialOrd, Ord, Eq, Clone)]
 pub struct Address {
+    pub sheet: u32,
     pub row: usize,
     pub col: usize,
 }
 
 impl Address {
     pub fn new(row: usize, col: usize) -> Self {
-        Self { row, col }
+        Self { sheet: 0, row, col }
     }
 
     pub fn to_range_part(&self) -> String {
@@ -215,7 +218,7 @@ impl<'ws> Workspace<'ws> {
                 format!(":{}", end.to_range_part())
             );
             if let Some(range_sheet) = state.range_select.sheet {
-                if range_sheet != self.book.current_sheet {
+                if range_sheet != self.book.location.sheet {
                     return format!(
                         "{}!{}",
                         self.book
@@ -243,6 +246,7 @@ impl<'ws> Workspace<'ws> {
     /// Move to the top row without changing columns
     pub fn move_to_top(&mut self) -> Result<()> {
         self.book.move_to(&Address {
+            sheet: self.book.location.sheet,
             row: 1,
             col: self.book.location.col,
         })?;
@@ -411,7 +415,7 @@ impl<'ws> Workspace<'ws> {
                         self.book.set_sheet_name(idx as u32, name)?;
                     }
                     _ => {
-                        self.book.set_sheet_name(self.book.current_sheet, name)?;
+                        self.book.set_sheet_name(self.book.location.sheet, name)?;
                     }
                 }
                 Ok(None)
@@ -431,7 +435,7 @@ impl<'ws> Workspace<'ws> {
                 for r in row..(row + row_count) {
                     self.book.set_row_style(
                         &[("fill.bg_color", &color)],
-                        self.book.current_sheet,
+                        self.book.location.sheet,
                         r,
                     )?;
                 }
@@ -443,14 +447,14 @@ impl<'ws> Workspace<'ws> {
                 for c in col..(col + col_count) {
                     self.book.set_col_style(
                         &[("fill.bg_color", &color)],
-                        self.book.current_sheet,
+                        self.book.location.sheet,
                         c,
                     )?;
                 }
                 Ok(None)
             }
             Ok(Some(Cmd::ColorCell(color))) => {
-                let sheet = self.book.current_sheet;
+                let sheet = self.book.location.sheet;
                 let area = if let Some((start, end)) = self.state.range_select.get_range() {
                     Area {
                         sheet,
@@ -510,10 +514,6 @@ impl<'ws> Workspace<'ws> {
                 KeyCode::Char('D') => {
                     if let Some((start, end)) = dbg!(self.state.range_select.get_range()) {
                         self.book.clear_cell_range_all(
-                            self.state
-                                .range_select
-                                .sheet
-                                .unwrap_or_else(|| self.book.current_sheet),
                             start,
                             end,
                         )?;
@@ -522,10 +522,6 @@ impl<'ws> Workspace<'ws> {
                 KeyCode::Char('d') => {
                     if let Some((start, end)) = self.state.range_select.get_range() {
                         self.book.clear_cell_range(
-                            self.state
-                                .range_select
-                                .sheet
-                                .unwrap_or_else(|| self.book.current_sheet),
                             start,
                             end,
                         )?;
@@ -570,7 +566,7 @@ impl<'ws> Workspace<'ws> {
                         ws.book.select_next_sheet();
                         Ok(())
                     })?;
-                    self.state.range_select.sheet = Some(self.book.current_sheet);
+                    self.state.range_select.sheet = Some(self.book.location.sheet);
                 }
                 KeyCode::Char('p') if key.modifiers == KeyModifiers::CONTROL => {
                     self.state.range_select.reset_range_selection();
@@ -578,7 +574,7 @@ impl<'ws> Workspace<'ws> {
                         ws.book.select_prev_sheet();
                         Ok(())
                     })?;
-                    self.state.range_select.sheet = Some(self.book.current_sheet);
+                    self.state.range_select.sheet = Some(self.book.location.sheet);
                 }
                 KeyCode::Char('C') if key.modifiers.contains(KeyModifiers::CONTROL) => {
                     self.copy_range(true)?;
@@ -741,7 +737,7 @@ impl<'ws> Workspace<'ws> {
                 }
                 KeyCode::Char('l') if key.modifiers == KeyModifiers::CONTROL => {
                     self.run_with_prefix(|ws: &mut Workspace<'_>| -> Result<()> {
-                        let Address { row: _, col } = &ws.book.location;
+                        let Address { sheet: _, row: _, col } = &ws.book.location;
                         ws.book
                             .set_col_size(*col, ws.book.get_col_size(*col)? + 1)?;
                         Ok(())
@@ -749,7 +745,7 @@ impl<'ws> Workspace<'ws> {
                 }
                 KeyCode::Char('h') if key.modifiers == KeyModifiers::CONTROL => {
                     self.run_with_prefix(|ws: &mut Workspace<'_>| -> Result<()> {
-                        let Address { row: _, col } = &ws.book.location;
+                        let Address { sheet: _, row: _, col } = &ws.book.location;
                         let curr_size = ws.book.get_col_size(*col)?;
                         if curr_size > 1 {
                             ws.book.set_col_size(*col, curr_size - 1)?;
@@ -847,7 +843,7 @@ impl<'ws> Workspace<'ws> {
                 self.book.evaluate();
             }
             Some(ClipboardContents::Range(ref rows)) => {
-                let Address { row, col } = self.book.location.clone();
+                let Address { sheet, row, col } = self.book.location.clone();
                 let row_len = rows.len();
                 for ri in 0..row_len {
                     let columns = &rows[ri];
@@ -855,6 +851,7 @@ impl<'ws> Workspace<'ws> {
                     for ci in 0..col_len {
                         self.book.update_cell(
                             &Address {
+                                sheet,
                                 row: ri + row,
                                 col: ci + col,
                             },
@@ -896,8 +893,8 @@ impl<'ws> Workspace<'ws> {
     }
 
     fn enter_range_select_mode(&mut self, init_start: bool) {
-        self.state.range_select.sheet = Some(self.book.current_sheet);
-        self.state.range_select.original_sheet = Some(self.book.current_sheet);
+        self.state.range_select.sheet = Some(self.book.location.sheet);
+        self.state.range_select.original_sheet = Some(self.book.location.sheet);
         self.state.range_select.original_location = Some(self.book.location.clone());
         if init_start {
             self.state.range_select.start = Some(self.book.location.clone());
@@ -932,7 +929,7 @@ impl<'ws> Workspace<'ws> {
     }
 
     fn exit_range_select_mode(&mut self) -> Result<()> {
-        self.book.current_sheet = self
+        self.book.location.sheet = self
             .state
             .range_select
             .original_sheet
diff --git a/src/ui/render/mod.rs b/src/ui/render/mod.rs
index 2655307..6afba12 100644
--- a/src/ui/render/mod.rs
+++ b/src/ui/render/mod.rs
@@ -36,7 +36,7 @@ impl<'ws> Workspace<'ws> {
                         .map(|(idx, name)| format!("{} {}", name, idx))
                         .collect::<Vec<String>>(),
                 )
-                .select(Some(ws.book.current_sheet as usize));
+                .select(Some(ws.book.location.sheet as usize));
                 tabs.render(rect, buf);
             }),
             Box::new(|rect: Rect, buf: &mut Buffer, ws: &mut Self| {
diff --git a/src/ui/render/test.rs b/src/ui/render/test.rs
index aed6856..7c55d47 100644
--- a/src/ui/render/test.rs
+++ b/src/ui/render/test.rs
@@ -15,7 +15,7 @@ fn test_viewport_get_visible_columns() {
     let width = dbg!(dbg!(default_size) * 12 / 2);
     let app_state = AppState::default();
     let viewport = Viewport::new(&book, Some(&app_state.range_select))
-        .with_selected(Address { row: 1, col: 17 });
+        .with_selected(Address { sheet: 0, row: 1, col: 17 });
     let cols = viewport
         .get_visible_columns((width + 5) as u16, &mut state)
         .expect("Failed to get visible columns");
@@ -32,7 +32,7 @@ fn test_viewport_get_visible_rows() {
     let height = 6;
     let app_state = AppState::default();
     let viewport = Viewport::new(&book, Some(&app_state.range_select))
-        .with_selected(Address { row: 17, col: 1 });
+        .with_selected(Address { sheet: 0, row: 17, col: 1 });
     let rows = dbg!(viewport.get_visible_rows(height as u16, &mut state));
     assert_eq!(height - 1, rows.len());
     assert_eq!(
@@ -53,7 +53,7 @@ fn test_viewport_visible_columns_after_length_change() {
     {
         let app_state = AppState::default();
         let viewport = Viewport::new(&book, Some(&app_state.range_select))
-            .with_selected(Address { row: 1, col: 17 });
+            .with_selected(Address { sheet: 0, row: 1, col: 17 });
         let cols = viewport
             .get_visible_columns((width + 5) as u16, &mut state)
             .expect("Failed to get visible columns");
@@ -66,7 +66,7 @@ fn test_viewport_visible_columns_after_length_change() {
     {
         let app_state = AppState::default();
         let viewport = Viewport::new(&book, Some(&app_state.range_select))
-            .with_selected(Address { row: 1, col: 1 });
+            .with_selected(Address { sheet: 0, row: 1, col: 1 });
         let cols = viewport
             .get_visible_columns((width + 5) as u16, &mut state)
             .expect("Failed to get visible columns");
diff --git a/src/ui/render/viewport.rs b/src/ui/render/viewport.rs
index e3bf60e..68d140b 100644
--- a/src/ui/render/viewport.rs
+++ b/src/ui/render/viewport.rs
@@ -152,7 +152,7 @@ impl<'ws> Viewport<'ws> {
                         |VisibleColumn { idx: ci, length: _ }| {
                             let content = self
                                 .book
-                                .get_cell_addr_rendered(&Address { row: ri, col: *ci })
+                                .get_cell_addr_rendered(&Address { row: ri, col: *ci, sheet: self.book.location.sheet})
                                 .unwrap();
                             self.compute_cell_style(ri, *ci, Cell::new(Text::raw(content)))
                         },
@@ -195,7 +195,7 @@ impl<'ws> Viewport<'ws> {
     ) -> Cell<'widget> {
         let style = self
             .book
-            .get_cell_style(self.book.current_sheet, &Address { row: ri, col: ci });
+            .get_cell_style(&Address { sheet: self.book.location.sheet, row: ri, col: ci });
         let bg_color = map_color(
             style.as_ref().map(|s| s.fill.bg_color.as_ref()).flatten(),
             Color::Rgb(35, 33, 54),
diff --git a/src/ui/test.rs b/src/ui/test.rs
index 356b695..1ef8489 100644
--- a/src/ui/test.rs
+++ b/src/ui/test.rs
@@ -542,8 +542,9 @@ fn test_range_copy() {
     let mut ws = new_workspace();
     assert_eq!(Some(&Modality::Navigate), ws.state.modality_stack.last());
 
+    let address = Address::default();
     ws.book
-        .move_to(&Address { row: 1, col: 1 })
+        .move_to(&address)
         .expect("Failed to move to row");
     let original_loc = ws.book.location.clone();
     script()
@@ -564,7 +565,7 @@ fn test_range_copy() {
         .run(&mut ws)
         .expect("Failed to handle key sequence");
     assert_eq!(
-        Some(Address { row: 1, col: 2 }),
+        Some(Address { sheet: 0, row: 1, col: 2 }),
         ws.state.range_select.start
     );
 
@@ -576,18 +577,18 @@ fn test_range_copy() {
 
     assert!(ws.state.range_select.original_location.is_none());
     assert_eq!(
-        Some(Address { row: 1, col: 2 }),
+        Some(Address { sheet: 0, row: 1, col: 2 }),
         ws.state.range_select.start
     );
-    assert_eq!(Some(Address { row: 2, col: 2 }), ws.state.range_select.end);
+    assert_eq!(Some(Address { sheet: 0, row: 2, col: 2 }), ws.state.range_select.end);
     assert_eq!(original_loc, ws.book.location);
     assert_eq!(Some(&Modality::Navigate), ws.state.modality_stack.last());
 
     ws.book
-        .move_to(&Address { row: 5, col: 5 })
+        .move_to(&Address { sheet: 0, row: 5, col: 5 })
         .expect("Failed to move to row");
     let original_loc_2 = ws.book.location.clone();
-    assert_eq!(Address { row: 5, col: 5 }, original_loc_2);
+    assert_eq!(Address { sheet: 0, row: 5, col: 5 }, original_loc_2);
 
     script()
         .char('v')
@@ -607,7 +608,7 @@ fn test_range_copy() {
         .run(&mut ws)
         .expect("Failed to handle key sequence");
     assert_eq!(
-        Some(Address { row: 5, col: 5 }),
+        Some(Address { sheet: 0, row: 5, col: 5 }),
         ws.state.range_select.start
     );
 
@@ -619,11 +620,11 @@ fn test_range_copy() {
 
     assert!(ws.state.range_select.original_location.is_none());
     assert_eq!(
-        Some(Address { row: 5, col: 5 }),
+        Some(Address { sheet: 0, row: 5, col: 5 }),
         ws.state.range_select.start
     );
-    assert_eq!(Some(Address { row: 5, col: 4 }), ws.state.range_select.end);
-    assert_eq!(Address { row: 4, col: 5 }, ws.book.location);
+    assert_eq!(Some(Address { sheet: 0, row: 5, col: 4 }), ws.state.range_select.end);
+    assert_eq!(Address { sheet: 0, row: 4, col: 5 }, ws.book.location);
     assert_eq!(Some(&Modality::Navigate), ws.state.modality_stack.last());
 }
 
@@ -652,14 +653,14 @@ fn test_gg_movement() {
         .char('j')
         .run(&mut ws)
         .expect("failed to handle event sequence");
-    assert_eq!(ws.book.location, Address { row: 3, col: 1 });
+    assert_eq!(ws.book.location, Address { sheet: 0, row: 3, col: 1 });
     script()
         .char('l')
         .char('g')
         .char('g')
         .run(&mut ws)
         .expect("failed to handle event sequence");
-    assert_eq!(ws.book.location, Address { row: 1, col: 2 });
+    assert_eq!(ws.book.location, Address { sheet: 0, row: 1, col: 2 });
 }
 
 #[test]
@@ -672,14 +673,14 @@ fn test_h_j_k_l_movement() {
         .char('l')
         .run(&mut ws)
         .expect("failed to handle event sequence");
-    assert_eq!(ws.book.location, Address { row: 3, col: 2 });
+    assert_eq!(ws.book.location, Address { sheet: 0, row: 3, col: 2 });
     script()
         .char('h')
         .char('2')
         .char('k')
         .run(&mut ws)
         .expect("failed to handle event sequence");
-    assert_eq!(ws.book.location, Address { row: 1, col: 1 });
+    assert_eq!(ws.book.location, Address { sheet: 0, row: 1, col: 1 });
 }
 
 macro_rules! assert_copy_paste {
@@ -929,8 +930,8 @@ fn test_command_mode_enter() {
 fn test_edit_mode_paste() {
     let mut ws = new_workspace();
     assert_eq!(Some(&Modality::Navigate), ws.state.modality_stack.last());
-    ws.state.range_select.start = Some(Address { row: 1, col: 1 });
-    ws.state.range_select.end = Some(Address { row: 2, col: 2 });
+    ws.state.range_select.start = Some(Address { sheet: 0, row: 1, col: 1 });
+    ws.state.range_select.end = Some(Address { sheet: 0, row: 2, col: 2 });
     dbg!(ws.selected_range_to_string());
     script()
         .char('e')
@@ -979,8 +980,8 @@ macro_rules! assert_range_clear {
     ($script : expr) => {{
         let mut ws = new_workspace();
         assert_eq!(Some(&Modality::Navigate), ws.state.modality_stack.last());
-        let first_corner = Address { row: 1, col: 1 };
-        let second_corner = Address { row: 2, col: 2 };
+        let first_corner = Address { sheet: 0, row: 1, col: 1 };
+        let second_corner = Address { sheet: 0, row: 2, col: 2 };
         ws.book
             .update_cell(&first_corner, "foo")
             .expect("Failed to update cell");
@@ -1050,18 +1051,17 @@ fn test_range_select_movement() {
         .char('k')
         .run(&mut ws)
         .expect("failed to run script");
-    assert_eq!(&Address { row: 3, col: 3 }, &ws.book.location);
-    assert_eq!(0, ws.book.current_sheet);
+    assert_eq!(&Address { sheet: 0, row: 3, col: 3 }, &ws.book.location);
     script()
         .ctrl('n')
         .run(&mut ws)
         .expect("Unable to run script");
-    assert_eq!(1, ws.book.current_sheet);
+    assert_eq!(1, ws.book.location.sheet);
     script()
         .ctrl('p')
         .run(&mut ws)
         .expect("Unable to run script");
-    assert_eq!(0, ws.book.current_sheet);
+    assert_eq!(0, ws.book.location.sheet);
 }
 
 #[test]
@@ -1072,8 +1072,8 @@ fn test_range_select_clear_lower_d() {
 macro_rules! assert_range_copy {
     ($script: expr) => {{
         let mut ws = new_workspace();
-        let top_left_addr = Address { row: 2, col: 2 };
-        let bot_right_addr = Address { row: 4, col: 4 };
+        let top_left_addr = Address { sheet: 0, row: 2, col: 2 };
+        let bot_right_addr = Address { sheet: 0, row: 4, col: 4 };
         ws.book
             .update_cell(&top_left_addr, "top_left")
             .expect("Failed to update top left");
@@ -1112,7 +1112,7 @@ macro_rules! assert_range_copy {
                 .expect("Didn't find a start of range")
         );
         assert_eq!(
-            &Address { row: 1, col: 1 },
+            &Address { sheet: 0, row: 1, col: 1 },
             ws.state
                 .range_select
                 .original_location
@@ -1188,7 +1188,7 @@ fn test_extend_to_range() {
         .expect("Unable to run script");
     let extended_cell = ws
         .book
-        .get_cell_addr_contents(&Address { row: 2, col: 1 })
+        .get_cell_addr_contents(&Address { sheet: 0, row: 2, col: 1 })
         .expect("Failed to get cell contents");
     assert_eq!("=B2+1".to_string(), extended_cell);
 }
@@ -1208,7 +1208,7 @@ fn test_color_cells() {
         for ci in 1..=3 {
             let style = ws
                 .book
-                .get_cell_style(ws.book.current_sheet, &Address { row: ri, col: ci })
+                .get_cell_style(&Address { sheet: ws.book.location.sheet, row: ri, col: ci })
                 .expect("failed to get style");
             assert_eq!(
                 "#800000",
@@ -1234,7 +1234,7 @@ fn test_color_row() {
     for ci in [1, book::LAST_COLUMN] {
         let style = ws
             .book
-            .get_cell_style(ws.book.current_sheet, &Address { row: 1, col: ci as usize })
+            .get_cell_style(&Address { sheet: ws.book.location.sheet, row: 1, col: ci as usize })
             .expect("failed to get style");
         assert_eq!(
             "#800000",
@@ -1259,7 +1259,7 @@ fn test_color_col() {
     for ri in [1, book::LAST_ROW] {
         let style = ws
             .book
-            .get_cell_style(ws.book.current_sheet, &Address { row: ri as usize, col: 1 })
+            .get_cell_style(&Address { sheet: ws.book.location.sheet, row: ri as usize, col: 1 })
             .expect("failed to get style");
         assert_eq!(
             "#800000",