Caro's Book of Poker Tells (The Body Language & Psychology of Poker)
Author: Mike Caro
Mike Caro, well regarded poker author, has written a stunning book on the psychology and body language of poker players. Caro goes into fine detail over tells and giveaway signals, many players will find this type of knowledge hugely helpful. There are also some elements to this book which can be used in the online poker arena.
This book is an excellent choice for those wanting to get into the head of their opponents.