CAT

It's very difficult to get an online book but I will share you some books which will helps you:
https://paytm.com/shop/g/books/entrance-exam/mba
http://www.amazon.in/CAT-Preparation-Books/b?ie=UTF8&node=4149776031
https://www.infibeam.com/Books-entrance-exams/

There are national level entrance exams for MBA other than CAT like XAT-Xavier's aptitude test for admission in Xavier's Labor Reform Institute. Xavier's University-Bhubaneshwar, XIMB Bangalore and XIMJ-Jabalpur are offering MBA in finance and there is NMAT for Narsee Monji-Mumbai which also offers finance and MAT for various B-schools across India.
There are certain state level exams also like MH-CET which can lead you to JBIMS, Mumbai (CEO factory) and other state level exams also.

There is REVA university.
The eligibility criteria for MBA is:
Bachelors degree of three years in any
stream or B E / B Tech with 50% (45% in
case of candidates belonging to SC/ST) of
marks in aggregate from any recognized
University / Institution or any other
qualification recognized as equivalent there to.

CAT is an entry level exam for MBA. Cracking it is difficult. It requires hard working and good training. Try to get into a good coaching center and start preparing for CAT.

It is an absolutely right decision to appear for CAT to seek admission in PGDM or MBA in India's top B-Schools. It will open door of opportunities for you.

Hi Janagam,
You should score 95+ percentile in CAT to get into IIMs. Further, IIMs short-list candidates based on Personal Interviews (PI) and Group Discussion (GD). Apart from these, graduation percentage is also a factor for admission into IIMs.
You can visit the official websites for complete information.

Hello Sunil! Only having a good CAT score(99+ percentile for older IIMs) isn't enough. You also need to meet their eligibility criteria, have good academic scores, and perform really well in their What-PI rounds to get selected.

Yes, you need to give your graduation marksheets. You can get all the information regarding CAT on the official website www.iimcat.ac.in