As a UX designer, what do you consider the must-read book(s) about behavioral psychology?

over 6 years ago from , Designer + Front-end Developer

I'm helping a teacher gather a list of books to teach design students about psychology. The course will be particularly tailored for students of UX design, so I'm curious to know what the books about behavioral psychology were invaluable to you practicing UX designers out there (or whatever UX people are calling themselves nowadays).