In general, books are sold by the study association of your specific study programme. During the study programme specific part of the Kick-In you will receive information about your books. Therefore you don't have to buy them before you arrive at the UT. IF you cannot join the Kick-In, please contact your study-association for information.
Do you want to know which books or other educational material is used in a course? You can view all courses, course descriptions and course material via www.utwente.nl/coursecatalogue.