The Campus Book Store (Campusbutiken) has really great deals on course literature and study equipment like pens, markers and notepads. Student Union Members get a 5 percent discount!
The book store sells mainly second hand books in good condition, and has a great selection. You can search for books on their website.
Buy and sell
In addition the store offers the service of selling your old books that you no longer need. Just hand it in, and when another student buys your book, you will be notified and receive your money. A great way to boost your student economy.