Best books for CAT are Arun Sharma - Quantitative Analysis

Arun Sharma - Verbal Ability

and the best study material is of TIME (classes) and buy test series of IMS 

Buy subscription of THE HINDU newspaper 

Read novels to improve your vocab and reading skills 

Hi,
I think you should take mock tests first to check and go through the  previous year papers before appearing for the actual exam . If you are preparing for CAT then you'll be pretty much preferred for other aptitude tests too. An extra section you need to prepare is of GK. You can go for Arun Sharma's books. You can check out various online coaching like Handa ka Funda. For english you can go for word power made easy, Norman Lewis.
For more books check here:
Antra Anapindi prepare Cat/xat/snap/irma/GMAT and other exams
Hope this helps!

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