1. The Official Guide for GMAT Review
This book is published by the administrators of the GMAT exam and hence it is highly recommended. It is the closest best preparation of the GMAT exam that one can achieve. One must definitely buy this book to start off a serious preparation with an authentic guide.
2. Kaplan’s GMAT Premier Program
For those who are unfamiliar with the GMAT pattern and questions, this book is a must-have. Most questions in the book are tougher than they appear in the exam but it doesn’t harm to be well-prepared.