Martin says that 1.2 million students attend colleges with a CBR-partnered bookstore.

FORBES: Looking For A Nice Annuity? Try Renting Out Your Textbooks

With a program called Rentback, the Utah-based company encourages students to send in their used textbooks, which CBR then rents out per the usual process.

FORBES: Looking For A Nice Annuity? Try Renting Out Your Textbooks