First, you have to find which is the best way for you learn. Exist some ways of learn: auditory, visual, kinesthetic. After of finding the best way, then you decide. Anyways, here are some books about the psychology of the poker:
The Mental Game of Poker: Proven Strategies for Improving Tilt Control, Confidence, Motivation, Coping with Variance (Jared Tendler)
The Psychology of Poker (Alan N. Schoonmaker)
The Poker Mindset: Essential Attitudes for Poker Success (Matthew Hilger)
Reading Poker
tells (Zachary Elwood)
Good reading!