Hello buddy, just came across your question. Yes, using books on rent is a pretty cool idea to save money. There are many website in India offer books on rent for a certain period of time. I also have tried Flip-kart, Amazon etc. to fulfill my need, but the problem comes out when the book you are searching isn't available. But there is one company named as "Pustakkosh (www.pustakkosh.com)" that i always find right in my case. You can find every book your want on rent at a reasonable rate. Hope this helps, Thanks! đ