The Official Guide for GMAT Review
The Official Guide for GMAT Review has been designed and written by the staff of Educational Testing Service, which prepares the Graduate Management Admission Test used by many graduate schools of business and management as one criterion in considering applications for admission to their graduate programs. This book is intended to be a general guide to the kinds of questions likely to appear in the GMAT. All questions used to illustrate the various types of verbal and mathematical multiple-choice questions are taken from actual editions of the GMAT administered between June 1990 and January 1997.
Absolutely stunning and flawless. Promoted to one of my all-time favorite books. I've no clue how the author wrote this, but it is absolutely incredible.