I don't know if it's the case there, but many schools have a requirement that assigned textbooks have to be available through the local university bookstore. St

I don't know if it's the case there, but many schools have a requirement that assigned textbooks have to be available through the local university bookstore. Students don't have to buy them through that bookstore, but it has to be an option; you can't assign a textbook that the bookstore can't or won't stock. I believe the original intent of these rules was to keep professors from assigning obscure or out-of-print books that students would have trouble acquiring.