Hii Rajeev,

CAT exam has three sections:

• Quantitative Aptitude
• Data Interpretation and logical Reasoning
• Verbal Ability and Reading Comprehension

It does not matter about what book you read.It is all about how well you are good with the topic and application point of view.

I will suggest you some books which will help you to improve your command on the Topics.

• How to prepare for quantitative aptitude for CAT by Arun sharma
• How to prepare for logical Reasoning for CAT by Arun sharma
• How to prepare for Verbal Ability for CAT by Arun sharma and Meenakshi 
• Quantitative Aptitude for CAT by Nishit sinha
• Logical reasoning and data interpretation for CAT by Nishit k.sinha
• Word power made easy by Norman lewis

Thank you.