Which books and resources to use for preparation

Hello beta.. VARC, English and Vocab - No reference book is needed. You only need to read and for that you can go through the booklist on my YouTube channel and you can read articles on newspapers/other websites. There are many websites out there which you can use - Aeon, Guardian, Hindu.. or we have a reading section right here on CATLab, you can use that as well. 

 LRDI - Puzzles and Teasers by George J Summers, and start playing Chess. When the time comes to solve CAT relevant sets, you can use CATLab for practice and Elite’s Grid (YouTube channel) for theory and videos, but trust me, LRDI has no theory; it’s all practice and thinking ability. QA - For theory, use Ashu Jain. For Practice use CATLab or Sarvesh Verma. If you are very weak at Maths, begin with RS Aggarwal. If you want videos - Rodha (YouTube channel) has everything available for free. But if you don't mind paying a bit, then the video course by Takshzila is the best in the industry.