Not sure how it's today but 15 years ago at the university I went to, professors all made their own course books (sometimes in real textbook form, sometimes simply the bunch of slides they'd show during class, sometimes even just copied handwritten notes).<p>These were printed and bound (apparently some decades before that the binding had to be done by the students) at some local shop and we bought them as students for something between 7 to 25 or so euros each.<p>There were a few courses that recommended a particular actual real professionally printed book in addition but those were quite rare in fact, and usually an optional recommendation<p>This worked quite well by the way, we had a lot of material to study