Depends, I took economics modules at University, and that was the only subject where the mandatory course textbook was co-written by the module leader. Well, co

Depends, I took economics modules at University, and that was the only subject where the mandatory course textbook was co-written by the module leader. Well, co-written is strong: they added ten exercise questions and some call out boxes to the default Pearson textbook. Naturally, it was 40% more expensive.