diff --git a/content/posts/books.md b/content/posts/books.md
index f8bd26b..a001cb5 100644
--- a/content/posts/books.md
+++ b/content/posts/books.md
@@ -16,7 +16,7 @@ the [F] tag means that the book is available freely online. A great starting poi
 - The GO programming language
 - Design Patterns: Elements of Reusable Object-Oriented Software
 - The C Programming Language
-
+- Crypto Dictionary: 500 Tasty Tidbits for the Curious Cryptographer
 # Open Source/ Free software
 - La cattedrale e il bazaar
 - Open non e' Free [F]