diff --git a/free-programming-books.md b/free-programming-books.md
index c2b3f7f6ca278d346343f29e5c3cdc22ac95e07f..c500a0c128e867c21c9b43e7a7d6b022ad3a3e4f 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -67,6 +67,7 @@
 * [Haxe](#haxe)
 * [HTML / CSS](#html--css)
   * [Bootstrap](#bootstrap)
+  * [Tailwindcss](https://tailwindcss.com/docs) - Adam Wathan
 * [HTTP](#http)
 * [Icon](#icon)
 * [Idris](#idris)