Some resources for getting the PMP certification (based on a Linkedin Question)- This is a useful not too expensive and not very very tough certification for professionals who manage projects (and don’t we all !)
The main website –http://www.pmi.org/Pages/default.aspx
An additional book-http://www.amazon.com/PMP-Exam-Prep-Fifth-Passing/dp/1932735003
The main book – PMBOK
The detailed answers on the Linkedin site are much more helpful- Try it.