
Buying books online is a great way to save cash on your back to school purchases. My daughter, has been using Amazon for the past several years and she has consistently saved anywhere from 50% to 75% off the prices she would have paid at the college book stores.
But,
be careful to pick the exact same titles and versions and be sure they include and meet all the requirements for the class you are taking. On one occasion, I remember her ordering a book with the exact same title but a different version and it was not accepted by her instructor. She had to send it back and find another one.