Following books are recommended for preparation :-
BlackBook of General Awareness January 2023 by Nikhil Gupta :- https://amzn.to/3ZtD9PC
English Grammar & Composition Very Useful for All Competitive Examinations https://amzn.eu/d/diYB9Ke
A Modern Approach To Verbal & Non-Verbal Reasoning RS Aggarwal - https://amzn.to/3ISVsZ3
For computer Awareness - https://amzn.to/3KbrQqB