Back when Earth was still cooling down from its formation, I went to college. One of the biggest and most annoying expenses I faced was the cost of textbooks. One particulary nasty outlay came from an art history course I took (so lovingly referred to by us as Art in the Dark). The text was Janson's History of Art, a huge coffee table-size volume that has since morphed into a multi-volume set, selling on Amazon for about $150. Yikes.
Anyway, since I needed food money more than glossy van Gogh, I found a copy (then only one volume) in my local library and managed to keep it out for most of the 10-week term Penn State invoked at that time.