Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useless for the working engineer

John H Bickford does not write books to teach you how to do an actual bolt calculation with or without a gasket. Writing really thick books, he uses a million words, but I have not been able to do a single bolt calculation using any of his books. There are no examples, no case studies and no actual well defined/well outlined procedures in his books. The author quite actively gives short week long classes that cost thousands of dollars to attend. I finally figured out that his books are advertisements to gather students for his short high-priced classes. He has no intention of teaching you anything in his 150 dollar book. If you want to do a bolt calculation, use the good ol Shigley. For complex geometries use a Finite Element program. No need to buy any more John H Bickford books. And no need to attend high priced short classes (you will forget the material faster than the duration of the short training class).