PMP Exam Prep, Fifth Edition: Rita's Course in a Book for Passing the PMP Exam (Paperback)
by Rita Mulcahy, PMP

Filled with time tested advice, this book is definitely one of the best User’s Manual for preparing the PMP exam.

PMP In Depth: Project Management Professional Study Guide for PMP and CAPM Exams (In Depth) (Paperback)
by Paul Sanghera, Ph.D.

Hugely self-contained, to the point, and complete with a wealth of information on all the topics, PMP in Depth is a top pick in its area.

A Guide to the Project Management Body of Knowledge, Third Edition (PMBOK Guides) (Paperback)
by Project Management Institute

Required reading for PMP exam providing a good overview. Better use the book in conjunction with another reference.

The World of Mathematics: A Four-Volume Set (Paperback)
by James R. Newman

Universal Principles of Design (Hardcover)
by William Lidwell , Kritina Holden , Jill Butler

This wonderful and bestselling design book gets you thinking about design in new ways.

The Design of Everyday Things (Paperback)
by Donald A. Norman

This book should be required reading for software developers and anyone who designs and builds products for human use.

The Inmates Are Running the Asylum: Why High Tech Products Drive Us Crazy and How to Restore the Sanity (Paperback)
by Alan Cooper

Wonderful metaphors and framework for talking about interaction with software-based technology. Should be required reading for all programmers.

Mastering Regular Expressions (Paperback)
by Jeffrey Friedl

Written in easy to understand language, this book is an excellent choice for both learning the basics as well as better preparing yourself to apply them in real-world situations.

Shigley's Mechanical Engineering Design (Mcgraw-Hill Series in Mechanical Engineering) (Hardcover)
by Richard Budynas , J. Keith Nisbett

Machine Design: An Integrated Approach (3rd Edition) (Hardcover)
by Robert L. Norton