Hello Pratik

The study material provided by TIME is very good. For basic concepts it should be enough. In addition to that you can follow the following books:

VA-RC:

For Vocabulary: Word Power Made Easy by Norman Lewis

For enhancing the reading speed, any novel and newspaper and anything you can read will be good enough.

For Grammar: Normal Grammar Rules from Wren and Martin.

LR-DI:

Books by Arun Sharma (TMH) and by Nishant Sinha (Pearson)

Quant:

Quantum CAT by Sarvesh K Verma

Quantitative Aptitude by Arun Sharma

Hi bro, I am selling online study materials of mine at minimal price so to help future aspirants as I had already taken admission this year,