The first children’s book written by the Godmother of British fantasy, Diana Wynne Jones.OWN BACK LIMITEDREVENGE ARRANGED, PRICE ACCORDING TO TASKFrank and Jess set up Own Back Limited because they need the money – so why not offer to do the bad things people don’t dare to do themselves? Their first customer is the neighbourhood bully. After his tooth is knocked out by Vernon Wilkins, he demands a tooth from Wilkins in revenge.But the local witch, Biddy Iremonger, sees Own Ba