There is no specific book to master for IIM interview. You can do some courses to improve your personality, your fluency to speak English. These two will add a little in your interview.

But majorly your whole interview is based on your resume or if there is a specific form which college must have specifically asked you to fill. Questions asked are totally different from one student to other student. Generally questions are based on your graduation, work experience, your hobbies, interest, extra curriculars, general knowledge, HR questions about yourself and the college you are applying, latest news. Along with these most of the IIM interviews also concentrate on basic maths questions to test how good you are with numbers because during and after MBA all.the time you would need to play with numbers.

Again the topics  I mentioned above are in general There is no guarantee that all the topics or even half of them would be covered in an interview. It all depends on you how you drive the conversation in interview where you end your first question answer because mostly next question is in continuation with the first one if you left it on some point.

So trick is to end up your every question on the topic which is your strength so that next question is on that topic and you can completely nail the next question.

In short you need to all about yourself and what you have done very very well and drive the interview towards your strengths so that you can gain more marks with your answer.

The interview is completely a mystery where you could be asked anything so you need to prepare yourself strongly for things about you, your work, your Achievement, your interests, your motive behind MBA and such related contexts