When John Nesbit discovers that his little sister has been stolen by a weird group of fairies and replaced with a changeling, he knows he must rescue her. Although his journey to the world of the Strangers will lead to confrontations with terrifying creatures, John is determined to return his sister home safely through his own determination and the helpful insight of a classmate. Simultaneously funny and startling, is a richly satisfying adventure that combines British mythology and oral traditions with contemporary characters and settings.