This third book in the series sees the return of Jack Merryweather and Timmy Trial from Book 1. Just before Christmas they find themselves in the land of Err. They are lost and alone in a ferocious snow storm. They face many dangers. Do they faith and courage to battle against the creatures of Err?This adventure story will appeal to children of reading age and upwards. The adventure uses illustrations and allegories to teach children about salvation and the challenges of Christian living.