Textbook Revolution is the web’s source for free educational materials. This is a student-run, volunteer-operated website started in response to the textbook industry’s constant drive to maximize profits instead of educational value.
TBR’s mission is to drive the adoption of free textbooks by teachers and professors. We want to get these books into classrooms. Their approach is to bring all of the free textbooks we can find together in one place, review them, and let the best rise to the top and find their way into the hands of students in classrooms around the world.
Link: Textbook Revolution