[ldjb]

Nothing worse than courses that require a textbook written by the lecturer decades ago and is now out-of-print, with only one copy in the library that all the students have to fight over.

[harry8]

Yeah there is. Courses that require you to purchase the lecturer's terrible quality printed and photocopied(!) Unpublished "Lecture notes"

At least a garbage textbook damages their reputation in their field.

[irateswami]

I had a garbage math professor in college who did this, total bullshit.