CMAT is a computer-based online test of three hours duration.there are four sections such as Logical Reasoning, Quantitative Techniques & Data Interpretation, Language Comprehension and General Awareness.

Here are some of the books you can prefer:

Quantative Ability by Arun sharma

CMAT Common Management Admission Test Guide  by RPH Editorial Board

CMAT Common Management Admission Test  by G K P

The Pearson Complete Guide to the CMAT by Showick Thorpe

Good Luck!