Fox Animation has secured the film rights to the upcoming book The Hero's Guide to Saving Your Kingdom, says a story at The Hollywood Reporter. Written by Christopher Healy with illustrations by Todd Harris, the book is set for release tomorrow and is officially described as follows:

Prince Liam. Prince Frederic. Prince Duncan. Prince Gustav. You've never heard of them, have you? These are the princes who saved Sleeping Beauty, Cinderella, Snow White, and Rapunzel, respectively, and yet, thanks to those lousy bards who wrote the tales, you likely know them only as Prince Charming. But all of this is about to change. Rejected by their princesses and cast out of their castles, Liam, Frederic, Duncan, and Gustav stumble upon an evil plot that could endanger each of their kingdoms. Now it's up to them to triumph over their various shortcomings, take on trolls, bandits, dragons, witches, and other assorted terrors, and become the heroes no one ever thought they could be.

Debut author Christopher Healy takes us on a journey with four imperfect princes and their four improbable princesses, all of whom are trying to become perfect heroes—a fast-paced, funny, and fresh introduction to a world where everything, even our classic fairy tales, is not at all what it seems.

The film version will be produced by Peter Chernin and Dylan Clark (Rise of the Planet of the Apes).