Hugh's father buys him a cupboard to put his clothes in; that is the one thing he cannot do as it turns out, because his cupboard changes things - sometimes dangerously. It changes a wallet into a frighteened pig. It changes Hugh's friend, Penn. It affects all of them eventually; Penn, Hugh, Hugh's sister Jean, Penn's sister Anna. It gives Hugh dreams of castles; or are they really dreams. A CASTLE OF BONE is a novel about transformation and the borderline between fantasy and reality.