diff --git a/_toc.yml b/_toc.yml
index de509a6..74c0908 100644
--- a/_toc.yml
+++ b/_toc.yml
@@ -7,7 +7,6 @@
   - file: "sources/01a Download Process.ipynb"
   - file: "sources/01b Visualization.ipynb"
   - file: "sources/01c Coverage analysis.ipynb"
-  - file: "sources/01d Brandenburg mosaic.ipynb"
   - file: "sources/01e True-color pipeline.ipynb"
 - part: "Spectral Indices"
   chapters: