I failed the 1st exam in Apr 2012 even after studying the following.

PMBOK4

Head First

Rita Exam Prep 6

Andy Crow (Updated for Aug 2011 change - didn't help me a lot)

Some other books (can't remember) from Barnes & Nobles

iStudy PM Exam ($19 from Apple App)

I need something that actually covers the August 2011 changes....

- I studied apprx 3 months but there were handful of PMP q's that weren't in any of my study references above.