Textbooks for many UW Law School courses are available for purchase at the University Bookstore, located at 711 State Street, on the Library Mall, across from the Memorial Library. The University Bookstore is willing to place special orders for textbooks, if they are out of a book you need. They also sell used copies of some law texts. Many students also shop for some of their required and recommended textbooks online.
After you have enrolled in your classes you will be able to view class material requirements online at your "My UW" webspace. A 'demo' is available here for students on how to access required textbook information: https://registrar.wisc.edu/howto/.
Many instructors create "course packs" of materials that students in their courses are required to obtain instead of, or in addition to, traditional textbooks. PDF copies of those materials will be made available online to students enrolled in those courses through the course website. Students may simply review the course pack materials on line, or print them out on their own printer, or purchase a printed copy of the materials from the Law School Digital Print Shop on the second floor of the Law building.