Hi Mehul! There is no minimum graduation percentage required in order to be eligible for MAT. Now coming to the books. There is no specific book for MAT preparation. You may refer to any book or preparation material that caters to CAT/XAT or other entrance exams.

Section wise books are as follows:

Quantitative Ability

• How to Prepare for Quantitative Aptitude for CAT by Arun Sharma

• Quantitative Aptitude Quantum CAT Common Admission Tests For Admission into IIMs by Sarvesh K Verma

• Quantitative Aptitude For Competitive Examinations by Abhijit Guha

Verbal Ability

• Word Power by Norman Lewis

• Barron’s Dictionary

• For RCs, reading different types of pieces, fiction or non-fiction, news or article followed by analytical introspection.

• High School English Grammar & Composition by Wren, Martin

• The Students' Companion Book by Wilfred D.Best

• 30 Days to a More Powerful Vocabulary by Wilfred Funk and Norman Lewis

Data Interpretation & Logical Reasoning

• Data Interpretation for the CAT by Arun Sharma

• Data Interpretation for the CAT by Nishit K. Sinha

• Logical Reasoning for the CAT by Nishit K. Sinha

• How to Prepare for Logical Reasoning for the CAT by Arun Sharma

• Verbal Ability And Logical Reasoning For The CAT by Nishit K. Sinha

• Verbal & Non-Verbal Reasoning by R. S. Aggarwal

• Verbal Ability And Logical Reasoning For The CAT And Other MBA Examinations by T.I.M.E.

General Awareness

• Manorama Yearbook
• Magazines like Outlook, Frontline, The Week, India Today etc.
• One business daily such as The Economic Times or The Business Standard and one regular newspaper like The Hindu or The Indian Express
  

Apart from the books, you should also take regular mock tests and solve sample test papers to make the preparation complete.

If you are preparing for CAT then this material will be helpful for MAT preparation also. You can also prefer the books given below:

Mission MBA MAT Guide: BS Sijwali and Tarun Goyal
Complete Guide for MAT and Other MBA Entrance Exams: Deepak Agarwal
10 Challengers MAT: Dharmendra Mittal
A Modern Approach to Logical Reasoning: R.S. Aggarwal
Study Package for MAT: Arun Sharma
MAT (Management Aptitude Test) Entrance Exam Guide: R. Gupta
The Pearson Guide to Quantitative Aptitude for MBA Entrance Examinations: Dinesh Khattar
MAT Score Accelerator: Disha Publication

As per the eligibility you should be graduate in any of the field & final year students also can apply for the programme. You can check the further eligibility with the given below link.

https://bschool.careers360.com/articles/mat-eligibility-criteria

Good Luck!