Which book is better for clat preparation?

For legal reasoning / LA  AP bhardwaj book is best for all LLB entrance's..

The competition of CLAT exam has reached an altogether new level. So, it becomes important to make a wise choice of books in order to utilize your time maximally.

Starting with the Exam Pattern for CLAT Entrance Exam 2017:

English  40
General Knowledge  50
Elementary Mathematics  20
Legal Aptitude  50
Logical Reasoning  40.

Here are some of the important books you can refer:

Quantitative Aptitude by RS Agrawal.
Arihant - Reasoning book
Taxmann's - Legal Aptitude
English by AP Bharadwaj
IMS  - Legal Reasoning
Universal's  Guide to CLAT & LLB

All the best!

For me... Universal is best

It primarily depends on what kind of subject you wish to cover with these books. Like universal is good for mocks, but pearson is great for General Knowledge. Universal gives a large variety of questions and has good questions.