发几个Flex的学习资源

书籍：

目前在看两本

《Essential.ActionScript.3.0》

https://github.com/mikechambers/as3corelib
An ActionScript 3 Library that contains a number of classes and utilities for working with ActionScript? 3. These include classes for MD5 and SHA 1 hashing, Image encoders, and JSON serialization as well as general String, Number and Date APIs.

下面几篇博客也列出了一些比较不错的网站：

1. 推荐几个不错的Flex学习网站
2. Flex学习资料网站
3. Flex 学习站点汇总,(FLEX学习站点、博客、论坛)