Yeah. I haven't seen much in the way of modern textbooks but what I have seen tends to be full of garbage. Back when I was in school I couldn't stand used tex

Yeah. I haven't seen much in the way of modern textbooks but what I have seen tends to be full of garbage. Back when I was in school I couldn't stand used textbooks because they would contain someone else's highlighting and I found that very disruptive. I hate predigested garbage! We are not alone in that. My wife has some reference books in Chinese that I believe date from the 80s. They are printed on some rather cheap materials. She was trying to find some new ones--and has failed completely. I can't read them, let alone evaluate the usefulness, but she was appalled at what she found and continues to use her taped-together stuff.