Currently Amazon’s number one best-selling book, The Rabbit Who Wants to Fall Asleep isn’t popular because of its riveting plot or gorgeous illustrations. Parents are buying the self-published book from Swedish author and psychologist Carl-Johan Forssen Ehrlin because it promises to use “psychological techniques” to help children fall asleep.

Experts have compared the book to a form of “gentle hypnosis,” written with sleep-inducing cadences and employing cues like loud yawning. But Rabbit is far from the only children’s book using psychology. The following books all use well-established psychological methods, from cognitive behavioral therapy to deep breathing, to help children deal with a variety of issues.