Put the books on a server, charge (reasonably) for the download, and come into the 21st century.
Publishing companies give a portion of proceeds to the college. Crony capitalism at its best. /s
that doesn’t really work for science books or applied science books. those texts become reference books you sometimes refer to in your career, and it’s much easier to have a bunch of textbooks open at a desk than multiple PDF files on your computer when working through tough engineering or math problems. i’m glad i went to school before laptop computers when you had to take hand written notes in lecture.