What is your favorite Project Management reference or handbook ?

Project Management by Rita Mulkahi.

A Guide to the Project Management Body of Knowledge

by Project Management Institute

Project Pain Reliever: A Just-In-Time Handbook for Anyone Managing Projects

by Dave Garrett

Project Management JumpStart (Third Edition)

by Kim Heldman

Guide to Project Management: Getting it right and achieving lasting benefit (Second Edition)

by Paul Roberts

PMBOK v5. and Rita Mulkahi's book are very good ,,,but they are focusing on passing the PMP exam and getting the degree...there are also much more gides which provide definitions and strategies of project management (The Definitive Guide to Project Management by Nokes, Sebastian - PMI’s Governance of Portfolios, Programs, and Projects: A Practice Guide - Project Management Pathways by Martin Stevens and a lot more )

but i beleive that even though reading is necessary....but the practical experience is essential....may even more important....one of the reasons is books assume the ideal case but in reality this is never true

Thanks for invitation,

My favorite is PMBOK and I will follow its editions

I will also agree that the PMBOOK v5  belong to the family of the best PM literature 

Making Things Happen: Mastering Project Management- by Scott Berkun

I will agree with the PMBOK v5 - and as I have read, it accurately reflects the evolving profession.  

There are many handbooks on Project Management dealing with various aspects of Project Management. However, I have found the following book very clear and concise with several nice examples.

Effective Project Planning and Management written by W. Alan Randolph and Barry Z. Posner

This book has chapters. You can read this book in hours spending2 hours per day. The book is very interesting to read and you may find it quite helpful.  

My favourite reference is Edwels PMBOK Guide