For those who value their time just a bit, I would suggest sites like bookrenter.com where you rent the book instead of buying. It is much cheaper for the basic

For those who value their time just a bit, I would suggest sites like bookrenter.com where you rent the book instead of buying. It is much cheaper for the basic classes (e.g common CS classes like Data Structures) but I've noticed that for my more advanced graduate classes it's cheaper to buy used off Amazon.