diff --git a/free-programming-books.md b/free-programming-books.md
index 8a1459363f199eddd5fcdbe15d7de48e66fb63d7..3538b51c54ed11eb2f66861258d1ff72efbfe965 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -425,6 +425,7 @@
 * [CouchDB: The Definitive Guide](http://books.couchdb.org/relax/)
 * [The Little MongoDB Book](http://openmymind.net/2011/3/28/The-Little-MongoDB-Book)
 * [The Little Redis Book](http://openmymind.net/2012/1/23/The-Little-Redis-Book/)
+* [The Little Riak Book](http://littleriakbook.com/)
 * [Graph Databases](http://graphdatabases.com/)