Money, too, at least in the case of local library systems with a strong interest in e-books, could come from spending diverted from paper books. (librarycity.org)
I've got an iPad full of a gazillion - affordably - priced - ebooks I purchased and haven't read yet; a house full of hundreds of print books I've yet to read; an ongoing addiction to big, old, dusty secondhand bookstores; and I belong to two big local library system with excellent print and ebook selections / services. (madgeniusclub.com)
The best bet is to talk with your local library system and ask them to purchase the curriculum. (thelunchtray.com)