Amazon.com description: Product Description: A robust and wildly entertaining fairy tale, freely abridged from Eden Phillpotts's 1910 fantasy and wryly retold by Katherine and John Paterson.

An ambitious Stone Age man demands a talisman that will harden his heart, allowing him to take control of his tribe. Against his better judgment, the tribe's magic man creates the Flint Heart, but the cruelty of it causes the destruction of the tribe. Thousands of years later, the talisman reemerges to corrupt a kindly farmer, an innocent fairy creature, and a familial badger. Can Charles and his sister Unity, who have consulted with fairies such as the mysterious Zagabog, wisest creature in the universe, find a way to rescue humans, fairies, and animals alike from the dark influence of the Flint Heart? This humorous, hearty, utterly delightful fairy tale is the sort for an entire family to savor together or an adventurous youngster to devour.