Bob Cassidy, who stands for no malarky, writes exactly what he thinks in a field where some are trying to be deceptive and some just don't know what they are talking about. And, yet, in real life, when he was alive, he was very pleasant to talk to. He has read everything on the subjects he writes about. When he explains something, I "get it" when with others I don't, often. He even goes so far as to print what some known authority has said about a particular issue and then goes on to correct or clarify about what they got wrong or were off by "a miss is as good as a mile". In this field of cold reading, and you get the impression that he did readings a lot, besides his shows and demonstrations, he ties in how this can augment Tarot reading or palm readings, or astrology.
He mentions his friend Herb Dewey who gave us so much info that we use today, and what he thought about certain aspects of this field. After mastering this, you'll not need trickery, although he does go into ways to use it to show something more spectacular yet near the end of a reading. Finally he gives some valuable info in the Appendix. I feel this is the best book I have ever read on a field which always left me somewhat confused.