1. 中文翻译版 (更新中)

https://github.com/HagerHu/effective-objective-c-2.0 

2. Book的主页 和 代码主页

http://www.effectiveobjectivec.com

https://github.com/effectiveobjc/code

http://www.galloway.me.uk/2013/05/effective-objective-c-2-dot-0/ 

3. 国内开发者的学习笔记

http://blog.csdn.net/alfred_kwong/article/details/10102977

http://esoftmobile.com/2013/08/10/effective-objective-c/

http://beyondvincent.com/blog/2013/07/11/101/ (galloway 其他文章的翻译)

4. 扩展阅读

http://ashfurrow.com/blog/seven-habits-of-highly-effective-objective-c