diff --git a/free-programming-books.md b/free-programming-books.md
index 438eb74a83949..1412f2bf9dfdd 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -2157,6 +2157,7 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
 
 ### Verilog
 
+* [Verilog Quick Reference Guide - Sutherland HDL](http://sutherland-hdl.com/pdfs/verilog_2001_ref_guide.pdf) (PDF)
 * [Verilog Tutorial](http://www.asic-world.com/verilog/veritut.html)