Yes, you can mail (or ship via UPS) books back to the library. Just send the books to:
Circulation Department -- Returned Library Books
102 Stapleton Library
431 S. 11th St.
Indiana University of PA
Indiana, PA 15705
When you mail the book, we strongly recommend that you also insure the package for $100 per book. Insuring the package will provide tracking in case the package goes astray in the postal system and, if the books are indeed lost, it will cover the $100 "Lost Book Fee" that the library charges per lost book.
After you ship the books, you should check your library account to make sure the book is removed from your account. Watch the video below to learn how to access your library account.