There is no any particular books or syllabus so it is advisable to revise what you have studied in your class 12th and apart from that you can go for sample and previous year papers as these would be helping you to know the difficulty level along with the paper pattern as well, If you are going to apply Graduation programme.

You can download the sample papers with the given below link.

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

In case you are preparing for any other exam then let me know.

Good Luck!