Which are the good books that I should study while preparing for CAT exams? Or should I get my preparations done through any institute?

CAT preparation requires a lot of dedication. If you feel you will be able to do it yourself, use Arun Sharma for Quant, Reasoning and DI, Wren and Martin for Grammar and solve the puzzlebook og George J. Summers. If you are not the kind who will put in sufficient hours daily without motivation, jo