There is much discussion as to how to transition from the Project Management Body of Knowledge (PMBOK) to Agile or - and that's wiser - how to combine them into a sensible solution.

I just wanted to share links to articles written by Michele Sliger:

Relating PMBOK Practices to Agile Practices - Part 1
Relating PMBOK Practices to Agile Practices - Part 2
Relating PMBOK Practices to Agile Practices - Part 3
Relating PMBOK Practices to Agile Practices - Part 4

Although we can map agile practices to PMBOK processes and activities, it is a futile effort. Indeed the key difference resides in the approach: PMBOK is process-centric whereas agile is people-centric. To give you an idea, topics such as team dynamics and motivation make up only 20 pages of the 300+ page (without appendix) PMBOK guide, and the word "collaboration" appears only twice.