I'm in MBA 3rd semester.Which book should i refer for aptitude preparation for my campus placements?

There is no specific book focusing on aptitude. As a rule of thumb, you will get roughly 10 seconds to solve a question in an aptitude test. The aptitude test basically covers the English Language, Maths and Logical Reasoning. The best option is to go through questions asked for the Bank clerical ex

Campus placement depends on your academic background your % in all three semesters than your personality your communication/presentation skill etc. my suggestion is improve all these skills I am sure you will selected in campus placement.