As you want I am here giving you GMAT exam pattern and suggesting you good books for study for the exam

GMAT Exam Pattern
Section :
Duration and number of questions:
Analytical writing assessment
(30 minutes)(N/A)

Integrated reasoning
(30 minutes)(12 questions)

Quantitative
(75 minutes)(37 questions)

Verbal
(75 minutes)(41 questions)

Books to be use :
The Official Guide for GMAT Review 2016 (English) (Paperback)
Publisher: Wiley India Pvt Ltd



Kaplan GMAT Premier 2015 with 6 Practice Tests: Book + DVD + Online + Mobile (English) 2015 Edition (Paperback)
Publisher: Kaplan Publishing



The Official Guide for GMAT Review 2015 (English) (Paperback)
Publisher: Wiley India