diff --git a/Cargo.lock b/Cargo.lock
index c088c03..69acda4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -482,9 +482,9 @@ dependencies = [
 
 [[package]]
 name = "csv"
-version = "1.3.0"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac574ff4d437a7b5ad237ef331c17ccca63c46479e5b5453eb8e10bb99a759fe"
+checksum = "acdc4883a9c96732e4733212c01447ebd805833b7275a73ca3ee080fd77afdaf"
 dependencies = [
  "csv-core",
  "itoa",
@@ -501,16 +501,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "csvx"
-version = "0.1.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "92081efd8b1d03f5a1bf242876cfdd8fa2bf9fe521ddb2d31f8747dfa2dd2cb7"
-dependencies = [
- "csv",
- "thiserror",
-]
-
 [[package]]
 name = "deranged"
 version = "0.3.11"
@@ -1507,7 +1497,7 @@ dependencies = [
  "clap",
  "colorsys",
  "crossterm",
- "csvx",
+ "csv",
  "futures",
  "ironcalc",
  "ratatui",
diff --git a/Cargo.toml b/Cargo.toml
index fb9fea2..360d494 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,7 +9,6 @@ edition = "2021"
 anyhow = { version = "1.0.91", features = ["backtrace"] }
 clap = { version = "4.5.20", features = ["derive"] }
 crossterm = { version = "0.28.1", features = ["event-stream", "serde"] }
-csvx = "0.1.17"
 # this revision introduces a way to get the Model back out of the UserModel
 ironcalc = { git = "https://github.com/ironcalc/IronCalc" }
 futures = "0.3.31"
@@ -21,3 +20,4 @@ slice-utils = { git = "https://dev.zaphar.net/zaphar/slice-cursor-rs.git" }
 serde_json = "1.0.133"
 colorsys = "0.6.7"
 tui-markdown = { version = "0.3.1", features = [] }
+csv = "1.3.1"
diff --git a/src/book/mod.rs b/src/book/mod.rs
index 4c477ea..70bae2d 100644
--- a/src/book/mod.rs
+++ b/src/book/mod.rs
@@ -119,12 +119,23 @@ impl Book {
         )?))
     }
 
+    pub fn csv_for_sheet<W>(&self, sheet: u32, sink: W) -> Result<()>
+        where W: std::io::Write,
+    {
+        let rows = self.get_export_rows_for_sheet(sheet)?;
+        let mut writer = csv::Writer::from_writer(sink);
+        for row in rows {
+            writer.write_record(row)?;
+        }
+        Ok(())
+    }
+
     pub fn get_export_rows(&self) -> Result<Vec<Vec<String>>> {
         let sheet = self.location.sheet;
-        Ok(self.export_rows_for_sheet(sheet)?)
+        Ok(self.get_export_rows_for_sheet(sheet)?)
     }
 
-    pub fn export_rows_for_sheet(&self, sheet: u32) -> Result<Vec<Vec<String>>, anyhow::Error> {
+    pub fn get_export_rows_for_sheet(&self, sheet: u32) -> Result<Vec<Vec<String>>, anyhow::Error> {
         let worksheet = self
             .model
             .get_model()
@@ -170,6 +181,15 @@ impl Book {
         Ok(Self::from_model(load_from_xlsx(path, locale, tz)?))
     }
 
+    /// Save a sheet in the book to a csv file
+    pub fn save_sheet_to_csv(&self, sheet: u32, path: &str) -> Result<()> {
+        let file_path = std::path::Path::new(path);
+        let file = std::fs::File::create(file_path)?;
+        let writer = std::io::BufWriter::new(file);
+        self.csv_for_sheet(sheet, writer)?;
+        Ok(())
+    }
+
     /// Save book to an xlsx file.
     pub fn save_to_xlsx(&mut self, path: &str) -> Result<()> {
         // TODO(zaphar): Currently overwrites. Should we prompt in this case?