There are plethora of books available for CAT preparation.
For Quants and Data Interpretation you should refer to Nishit Sinha book.You can akso take Up TIME coaching material.
For Verbal ability and Logical Reasoning, Book by Arun sharma Mcgraw hill Publication is considered best.
Word oower made easy is wonderful book by Normal lewis for Verbal ability and is recommended.
For paper pattern check below.
https://www.google.co.in/amp/s/bschool.careers360.com/articles/cat-exam-pattern%3famp

1st thing u need to understand the detail syllabus of cat..u can find it on internet easily..then start to solve problems from rs agarwall qauntitative aptitude and then move on to arun sharma quant book..then for data interpretation,verbal,and logical reasoning,ucan refer arun sharma books..those are enough for cat exam..but major priorities should be given on concept..overall cat exam is based on only concept..u need to pratics a lot.hope this will help..:)

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