diff --git a/README.md b/README.md
index 6c5b8ed..3b96b50 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,4 @@ It uses the [wla-dx](https://github.com/vhelin/wla-dx) assembler toolchain.
 # Resources
 
 * https://wiki.superfamicom.org/
+* https://ersanio.gitbook.io/assembly-for-the-snes/