Add security book

README-ZH_CN.md

@@ -61,6 +61,8 @@
 
 ## 安全
 - 《Python黑帽子:黑客与渗透测试编程之道》[中文版](https://www.amazon.cn/Python%E9%BB%91%E5%B8%BD%E5%AD%90-%E9%BB%91%E5%AE%A2%E4%B8%8E%E6%B8%97%E9%80%8F%E6%B5%8B%E8%AF%95%E7%BC%96%E7%A8%8B%E4%B9%8B%E9%81%93-%E5%A1%9E%E8%8C%A8/dp/B013KKCLE4)
+- 《Python灰帽子:黑客与逆向工程师的Python编程之道》[中文版](https://book.douban.com/subject/6025284/)
+- 《Python绝技:运用Python成为顶级黑客》[中文版](https://www.amazon.cn/Python%E7%BB%9D%E6%8A%80-%E8%BF%90%E7%94%A8Python%E6%88%90%E4%B8%BA%E9%A1%B6%E7%BA%A7%E9%BB%91%E5%AE%A2-%E5%A5%A5%E7%A7%91%E7%BD%97/dp/B019ZRGBVU)
 
 ## WEB 开发
 - 《Flask Web开发：基于Python的Web应用开发实战》[中文版](https://www.amazon.cn/Flask-Web%E5%BC%80%E5%8F%91-%E5%9F%BA%E4%BA%8EPython%E7%9A%84Web%E5%BA%94%E7%94%A8%E5%BC%80%E5%8F%91%E5%AE%9E%E6%88%98-%E6%A0%BC%E6%9E%97%E5%B8%83%E6%88%88/dp/B00QT2TQCG)

README.md

@@ -61,6 +61,8 @@
 
 ## Security
 - *Black Hat Python: Python Programming for Hackers and Pentesters* [English Edition](http://www.amazon.com/Black-Hat-Python-Programming-Pentesters/dp/1593275900)
+- *Gray Hat Python: Python Programming for Hackers and Reverse Engineers* [English Edition](http://www.amazon.com/Gray-Hat-Python-Programming-Engineers/dp/1593271921)
+- *Violent Python: A Cookbook for Hackers, Forensic Analysts, Penetration Testers and Security Engineers* [English Edition](http://www.amazon.com/Violent-Python-Cookbook-Penetration-Engineers/dp/1597499579)
 
 ## Web Development
 - *Flask Web Development: Developing Web Applications with Python* [English Edition](http://www.amazon.com/Flask-Web-Development-Developing-Applications/dp/1449372627)