diff --git a/free-programming-books-zh.md b/free-programming-books-zh.md
index 117574bc72251555a245bc500894a7034aad5660..65e02855d4dade6aaa14eb935c130ef5080cf12d 100644
--- a/free-programming-books-zh.md
+++ b/free-programming-books-zh.md
@@ -627,7 +627,9 @@
 * [Rails 风格指南](https://github.com/JuanitoFatas/rails-style-guide/blob/master/README-zhCN.md)
 * [Ruby on Rails Tutorial 原书第 2 版](http://railstutorial-china.org)
 * [Ruby on Rails 实战圣经](https://ihower.tw/rails4/)
+* [Ruby on Rails 指南](http://guides.ruby-china.org)
 * [Ruby 风格指南](https://github.com/JuanitoFatas/ruby-style-guide/blob/master/README-zhCN.md)
+* [Sinatra](http://www.sinatrarb.com/intro-zh.html)
 * [笨方法学 Ruby](http://lrthw.github.io)