diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index b114b725a..2b05205ef 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -388,6 +388,7 @@ Books on general-purpose programming that don't focus on a specific language are
 
 ### Bash
 
+* [z](www.google.com) - Leithen
 * [Advanced Bash-Scripting Guide](https://tldp.org/LDP/abs/html/) - M. Cooper (HTML)
 * [Bash Guide for Beginners (2008)](https://www.tldp.org/LDP/Bash-Beginners-Guide/html/) - M. Garrels (HTML)
 * [Bash Notes for Professionals](https://goalkicker.com/BashBook/) - Compiled from StackOverflow documentation (PDF)