$$$$$$$.
Develope with major manufactor(s) to distribute a multifuction textbook reader device. Each semester students can pay to download there books to e-reader-like devices . The content is secured to reader-device and timebombed to the beginning of the next semester. There will be an app to highlight and save text which can be grouped as to the users' specifications. NO Printing ability to avoid illegal distribution. Voice to text app for incoming freshmen who still can't read (lol) or for multitasking.
Just as EDIG got the movie studio blessing for secure content, do the same with publishers. Plus the "green factor". Never wait for or run out of books for a semester. Authors still get their royality and can revise an edition (which they typically do often to make more $$$. Content is SECURE SECURE SECURE.
End of daily ramble ..............