modern, often cheaper and faster alternatives to your university bookstore are online bookstores.
Do check shipping costs and delivery times, though, before ordering. Both depend on where you live.

For a start, here are three links to Earth's Biggest Bookstore:

If your home is in the Americas, you may want to check Amazon USA at

If you are living in Europe, closer alternatives are



or

Of course, you may also order directly from the publisher.