Huh, teachers. I had one teaching computer architecture who treated Linda Null's book as a Holy Bible of the course. She liked to correct students by saying "you're wrong, you haven't read Linda Null, go read the book". It was fine until the point when she disagreed with what someone wrote on the test - and when that person has pointed out that it's straight from the book, she shrugged and said, "well, Linda Null is wrong". sigh