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Become a successful Project Manager
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A Guide to the Project Management Body of Knowledge, Third Edition (PMBOK Guides)A Guide to the Project Management Body of Knowledge, Third Edition (PMBOK Guides) by Project Management Institute
Buy used from: $4.85
A must read for all new and experienced project managers
Project Management: A Systems Approach to Planning, Scheduling, and ControllingProject Management: A Systems Approach to Planning, Scheduling, and Controlling by Harold Kerzner
Buy used from: $8.37
PMP Exam Prep, Fifth Edition: Rita's Course in a Book for Passing the PMP ExamPMP Exam Prep, Fifth Edition: Rita's Course in a Book for Passing the PMP Exam by Rita Mulcahy
Buy used from: $24.00
This PMP exam prep in combination with PM FASTrack CD-ROM will help you cruise through the PMP exam
PM FASTrack: PMP Exam Simulation Software, Version 5.2.0PM FASTrack: PMP Exam Simulation Software, Version 5.2.0 by Rita Mulcahy
Buy new: $299.00 / Used from: $163.99
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The PMP Exam: How to Pass On Your First Try (Test Prep series)The PMP Exam: How to Pass On Your First Try (Test Prep series) by Andy Crowe PMP
Buy used from: $34.32
A nice practice exam for the PMP is included in this book
CMMI(R): Guidelines for Process Integration and Product ImprovementCMMI(R): Guidelines for Process Integration and Product Improvement by Mary Beth Chrissis
Buy used from: $2.98
If you are in System or Software engineering, sections on PM process areas are a must read
Microsoft  Office Project 2003 Inside OutMicrosoft Office Project 2003 Inside Out by Teresa S. Stover
Buy new: $31.49 / Used from: $1.57
MS Project application bible
Microsoft® Office Project 2003 Step by Step (Step By Step (Microsoft))Microsoft® Office Project 2003 Step by Step (Step By Step (Microsoft)) by Carl Chatfield
Buy new: $19.79 / Used from: $2.97
A good starter's book on MS Project