what books to refer for CAT for DI, verbal, Logical, data sufficiency subjects?

Hi Pakshaal, I would say for preparation of CAT there is no one set of books which you can consult. You can prepare through various tests prep books available in the market such as R.S. Aggarwal, Galgotias, and Meenakshi & Arun Sharma. For quantitative ability & logical reasoning section you should

For DI/LR, it is better to follow Nishit K Sinha. For verbal, follow Arun sharma and for data sufficiency, RS Agarwal is better.