My engineer friends might agree that how we have to consult different books to get an in-depth knowledge about the subjects and prices of books being sky-high, it becomes really difficult to buy all the books these days.
Surfing through internet, I stumbled upon a website of TextNook, an online portal which provides books on rental basis. I found the concept to be very interesting and innovative and of a great help to the students like us. Do visit, if you happen to face the problem of spending too much on books like me. http://www.textnook.com/.