Here is a great find from Erik at Go Ed! Just click the link below to check out these 13 websites that may have some free books at your disposal.
"Are you looking for a way to save you and your students some money? If you’re not against going digital, try perusing these 13 websites for FREE electronic versions of the books you teach in class. On average, using one free eBook instead of a printed copy can save your class around $450!"
13 Websites That Offer Free eBooks for Teachers