The University of Minnesota Bookstores will make every effort to fill textbook orders with your preferred book type. You may select whether or not to allow substitutions for each title that you purchase when you add it to your cart. We will only substitute books with your permission, and only if we are out of stock on the type you requested. If we are out of stock on a book and you chose not to allow substitutions, it will be deleted from your order to expedite processing. We will create a special order for that title and you will be notified when the reorder arrives.