Some of the recommended books are: 

• R.S. Agarwal's book Quantitative Aptitude for Competitive Examinations

• R.S. Agarwal's Modern Approach to Verbal Reasoning

• Author Norman Lewis' Word Power Made Simple

• Arun Sharma's interpretation of the data

• S.P. Bakshi and Richa Sharma's Descriptive General English

• Priyohit Darpan

• Additionally, read the newspaper every day.