what is the best books for cat exam? which will lead to score above 90%?

Hey Abhijit.

Here is a list of various good books to prepare for CAT.

How to Prepare for Verbal Ability and Reading Comprehension for CAT’- by Arun Sharma & Meenakshi Upadhyay

‘How to Prepare for Data Interpretation for CAT’ - by Arun Sharma (Published by McGraw Hill)

‘How to Prepare for Logical Reasoning for the CAT’ - by Arun Sharma (Published by McGraw Hill)

‘How to prepare for Quantitative for the CAT’ - by Arun Sharma, published by MGH Education

Quantitative Aptitude for Competitive Examinations by Abhijit Guha (Tata McGraw-Hill)

Quantitative Aptitude for CAT and Other MBA Entrance Exams by Trishna Knowledge Systems (Pearson)

Nishit Sinha’s The Pearson Guide to Verbal Ability and Logical Reasoning (Pearson)

Trishna's Verbal Ability And Logical Reasoning For The CAT And Other MBA Examinations by T.I.M.E. Publisher: Pearson

Best of luck!