Hello Aspirant,

There is no any particular books for the exam preparation. In order to prepare for the Exam you can prefer the Graduation level of concerned subjects under the programme. You can also prefer the previous year papers to know the level of the question with the given below link.

http://bhuonline.in/old-qus-paper-entr.html

Which programme you are planning to apply for BHU PET?

Good Luck!