diff --git a/extras/books.md b/extras/paid-books.md
similarity index 99%
rename from extras/books.md
rename to extras/paid-books.md
index dcd0255..a6d3ce2 100644
--- a/extras/books.md
+++ b/extras/paid-books.md
@@ -1,6 +1,6 @@
 # Computer Science - Extra Resources
 
-## Books
+## Paid Books
 
 - [Introduction to Computer Science](#introduction-to-computer-science)
 - [Math (Mathematical Thinking)](#math-mathematical-thinking)