Hello candidate!

There is not a single book for a placement training. You have to go through all the basic concepts. For aptitude and verbal it is enough to get thorough with the basics till 10th standard. For technical rounds for programming it is enough to get some basic logics for the questions. No company will expect the full code to be written. Only the logics will be noted. Inspite of all these if you really need a single book for all i would recommend R.S.Agarwal book for quants verbal and reasoning. For programming go through some puzzles in the shakunthala devi puzzle book. You can get some logics there in that book. If you are from computer stream get ready to face questions on data structures, networks and computer graphics. The questions from these areas may arise inspite of your area of interest. For other streams like civil and mechanical problems can be asked to solve with the help of code book.

Hope this helps you!

Regards!