diff --git a/.gitignore b/.gitignore
index fb2e9eefaaebaaa706a36c5fae4934bde14eeb4b..5346959610b6965062fe9341f42f8ae318a8c364 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,10 @@
 # Created by https://www.toptal.com/developers/gitignore/api/visualstudiocode,macos,jupyternotebooks,python
 # Edit at https://www.toptal.com/developers/gitignore?templates=visualstudiocode,macos,jupyternotebooks,python
 
+### Jupyter Books ###
+# Ignore al built files & folders (for now).
+_build
+
 ### JupyterNotebooks ###
 # gitignore template for Jupyter Notebooks
 # website: http://jupyter.org/
@@ -23,7 +27,8 @@ ipython_config.py
 .LSOverride
 
 # Icon must end with two \r
-Icon

+Icon
+
 
 # Thumbnails
 ._*