Hello, here I am providing you the details of the books you must refer for the GMAT course as under:

Kaplan GMAT Math Workbook
Manhattan GMAT Word Translations
Kaplan Gmat Premier Live
Manhattan GMAT Advanced GMAT Quant
The PowerScore GMAT Sentence Correction Bible
The Official Guide for GMAT Quantitative Review 2nd Edition
Great Applications for Business School
GMAT Ultimate Grammar
Manhattan GMAT Test Simulation Booklet w/ Marker
Kaplan GMAT Verbal Workbook
Kaplan GMAT Advanced (Kaplan 800)
Manhattan GMAT Reading Comprehension
Manhattan GMAT Number Properties
Manhattan GMAT Foundations of GMAT Math
Official Guide 12th Edition
Official Guide 11th Edition
Official Guide 13th Edition
GMAT Prep Tests (downloadable)

GMAT paper pattern:
Section Time
Analytical Writing Assessment 30 Minutes
Integrated Reasoning 30 Minutes
Quantitative 75 Minutes
Verbal 75 Minutes

Contact details:
Email: GMATCandidateServicesAPAC@pearson.com
Telephone: +852-3077-4926, 9 a.m. to 6 p.m. AEST
In India: +91 120-439-7830,
9 a.m. to 6 p.m. Indian Standard Time
Fax: +91-120-4001660