I have seen sites that sell these books online .  If you go to this link there is a pretty good answer about what to study: http://in.answers.yahoo.com/question/index?qid=20060901024925AAbHy5D.  This site allows you the opportunity to buy books that necessary for the 2008 Engineering Exam. http://www.successcds.net/Engg_CD.htm.  If you really want to know what to study and why, then it might be a good idea to READ THIS PERSON’S POST on this link.  She sounds like she has taken these tests and she tells you what to skip and what to concentrate on studying and why.   Then you have to decide if you believe her, and then either follow her advice or get every book you think you need from the other site that offers books, and study as hard as you possibly can. http://www.mouthshut.com/review/Successful_Preparation_for_Std._XII-39981-1.html.  I thought that once you register to take these exams and get the registration number, after paying the fee; that they give you a list of the questions and what to study, and then you will really be prepared.   Read all of this information, and then decide what is best for you.  Make this decision very carefully because your future is at risk.