There is a bill being considered by the Ohio state legislature which would require all universities in the state to make digital textbooks available. From The Columbus Dispatch:
Saying it could save more than 50 percent on the cost of textbooks, some House Democrats want to give Ohio college students the chance to trade in their piles of expensive books for laptops or other electronic readers.
Supporters and the Ohio Board of Regents say the key to such a plan is convincing university faculty members that digital textbooks can work as well as the paper versions. Individual professors are responsible for choosing the textbooks used in their classes.
Under the bill, the regents would have two years to require publishers to electronic versions of textbooks. Publishers also would be required to provide textbook formats for students with disabilities.