Hey.

1. English- Word Power Made Easy by Norman Lewis for improving vocabulary. Tata McGrawhill for CLAT

RS aggarwal.

Other than these books you should also read the Editorial Section of the Newspapers for the Reading section as well as vocabulary.

2. Legal Reasoning and Awareness-  Lexis Nexis student guide for CLAT

Universal Guide for CLAT

3. Maths-  RS Agrawal

4. Logical Reasoning-  RS Agrawal 

Universal Guide for CLAT 

5. General Knowledge- Consize sized Pearsons

You can also use the site GK Today.in for Current affairs along with regularly reading the newspapers.

Make sure you do through and practice Previous year question papers as well. 

Best of luck!