The GMAT (Graduate Management Admission Test)

This site area provides general information about the GMAT (Graduate Management Admission Test) as well as detailed information about each part of the exam. Also available here are general strategies and advice for GMAT preparation and testing; practice questions in each basic format; tips for handling each question format; and a series of tutorials that explore GMAT testing procedures and strategies in an in-depth, Q&A format.

Widely recommended for GMAT prep:

GMAT book    The Official Guide for GMAT Review, 13th edition
Graduate Management Admission Council

From the test makers (GMAC), this book provides over 900 questions used on actual GMAT exams and keyed Web access to 50 exam questions for the new Integrated Reasoning section.