diff --git a/README.md b/README.md
index cd4257b..4b0829a 100644
--- a/README.md
+++ b/README.md
@@ -24,10 +24,15 @@ TODO: Add Rune Madsens
 ## Books
 [Generative Art]() - .
 Book of Shaders - https://thebookofshaders.com/
+
 http://pixelshaders.com/proposal/
+
+https://paroj.github.io/gltut/
+
 http://www.scratchapixel.com/
 
 
+
 ## Related awesome lists:
 https://github.com/raphamorim/awesome-canvas
 http://pixelshaders.com/external.html