From a7ad6fc2b1ac911de0cb78c9d6d5d329bce14165 Mon Sep 17 00:00:00 2001
From: Sanpi <sanpi@homecomputing.fr>
Date: Mon, 14 Oct 2013 19:10:06 +0200
Subject: [PATCH] Add "PHP Internals Book".

---
 free-programming-books.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/free-programming-books.md b/free-programming-books.md
index 27c26a51..2d6751fc 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -635,6 +635,7 @@
    * [Official Documentation (Offline Version)](https://leanpub.com/l4-offline-doc)
    * [Code Happy](http://codehappy.daylerees.com/) (Laravel 3 Starter Book)
    * [Code Bright](http://codebright.daylerees.com/) (Laravel 4 Starter Book)
+* [PHP Internals Book](http://www.phpinternalsbook.com/)
 
 
 ###PowerShell
-- 
GitLab