The No.1 bestselling series from current Waterstones Children's Laureate and author of How To Train Your Dragon, Cressida Cowell. Enter a land of wizards, warriors, mythical creatures and powerful Magic in an exciting fantasy adventure. Wish and Xar are outlaws on the run, hunted by Warriors, Wizards and worst of all by WITCHES ...Can they find the ingredients for the spell to get rid of Witches before the Kingwitch gets his talons on the Magic-that-Works-on-Iron?Their next Quest is the most terrifying and treacherous of all ... and someone is going to betray them. Are you ready to KNOCK THREE TIMES?'A rollercoaster of suspense and surprise' GUARDIAN'Cowell is moving towards national treasure' BIG ISSUE'Another coup from Cowell' SUNDAY TIMES | The Wizards of Once: Knock Three Times by Cressida Cowell, Hardcover | Indigo Chapters