University is expensive. One of the unavoidable costs of being a student is buying textbooks, some are only used for a year, some even less. Once finished with the book you may wish to keep it or sell it back to your campus bookshop at a cheap price. Why not just sell your unwanted textbooks back to students at your university for a price that you decide?
Hoolr acts as this platform for selling your books. Simply scan the barcode on the book, add which course it is from and be contacted by other students who want to buy from you!