There is no any particular books for the exam preparation, Here are some points given below you can prefer:

The main section is Legal Aptitude and Indian Politics so ace these topics.

Refer to 'The Hindus' newspaper for updates and current affairs. It will also benefit your English portion in the paper.

The legal part is full of questions based on principles and facts which can be practiced from previous years question papers.

For static GS lucent would sufficent and even Arihant publication.

You can check the Exam pattern of the exam with the given below link.

https://law.careers360.com/articles/pu-llb-exam-pattern

Good Luck!

Good Luck!