diff --git a/nix.html.markdown b/nix.html.markdown
index dde5dbec..1d5a7778 100644
--- a/nix.html.markdown
+++ b/nix.html.markdown
@@ -373,5 +373,8 @@ with builtins; [
 * [James Fisher - Nix by example - Part 1: The Nix expression language]
   (https://medium.com/@MrJamesFisher/nix-by-example-a0063a1a4c55)
 
+* [Susan Potter - Nix Cookbook - Nix By Example]
+  (https://ops.functionalalgebra.com/nix-by-example/)
+  
 * [Rommel Martinez - A Gentle Introduction to the Nix Family]
-  (https://ebzzry.io/en/nix/#nix)
+  (https://web.archive.org/web/20210121042658/https://ebzzry.io/en/nix/#nix)