CISA Review Manual

I have ISACA CISA Review Manual 2006 and I have seen the 2011 ISACA book. I can not see any changes in the contents of the chapters, Only they changed the names of the chapters. (This is my understanding)

Pls let me know that should i buy the latest review manual or i can study from the 2006 review manual...also if you can advice me for any book?

Thanks