What are the best books to prepare for CUSAT CAT exam ?

The things which are most important for the preparation is to know about the Exam Pattern, Syllabus, shortcuts, important formula, topics, units & chapters. Aspirants should focus on solving mock tests/previous year question papers and sample papers. Practice the chapters and numerical as much as you can for improving accuracy along with the speed. The important topics in Physics, Chemistry, and Mathematics are as follows:
For Physics, focus on heat and thermodynamics and wave motion.
In Chemistry, the important topics include Transition elements (d and f blocks), p-block elements, s-block elements, and organic chemistry.
Calculus, Probability, vectors, 3D Geometry, Complex Numbers & trigonometry are the most important topics for Mathematics.