As you want I am here giving you exam pattern and suggest good books for GMAT examination.

GMAT Exam Pattern:
Sections:
Analytical writing assessment
Integrated reasoning
Quantitative section
Verbal section

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)


Kaplan GMAT Math Workbook



Manhattan GMAT Sentence Correction Strategy Guide



Kaplan GMAT Verbal Workbook