From 1c4fdb2743ca90ed904e4fc870ab9a68e26bef31 Mon Sep 17 00:00:00 2001
From: Elvio Vicosa <elvio@elviovicosa.com>
Date: Sat, 6 Aug 2016 18:55:08 +0200
Subject: [PATCH] Adds Phoenix section and Versioned APIs book

---
 free-programming-books.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/free-programming-books.md b/free-programming-books.md
index 9dacad28..4f8e8183 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -34,6 +34,7 @@
 * [DTrace](#dtrace)
 * [Elasticsearch](#elasticsearch)
 * [Elixir](#elixir)
+  * [Phoenix](#phoenix)
 * [Emacs](#emacs)
 * [Embedded Systems](#embedded-systems)
 * [Erlang](#erlang)
@@ -978,6 +979,11 @@
 * [Learning Elixir](http://learningelixir.joekain.com) - Joseph Kain Blog (HTML)
 
 
+#### Phoenix
+
+* [Versioned APIs with Phoenix](http://elviovicosa.com/books/versioned-apis-with-phoenix) - Elvio Vicosa (PDF)
+
+
 ### Emacs
 
 * [An Introduction to Programming in Emacs Lisp, 3rd Edition](https://www.gnu.org/software/emacs/manual/html_node/eintr/index.html)