The adventurous, fantastical and brilliantly funny final book in the House at the Edge of Magic series. "A swooping, sparkling, story-filled feast of magic, imagination and fun!" - Sinéad O'HartNine and her friends are headed to the mortal realm in search of the only thing that will shake a very tricky witch off their tail: a priceless stargold locket.It lies hidden in the Nest of a Thousand Treasures, guarded by Nine’s old foe – the formidable gangmaster of all the thieflings in London. Even if Nine can get her hands on the locket, the friends must find a way to release its power – and for that they must travel through the World Between Worlds to the lighthouse on the Isle of Illusion, where nothing is quite as it seems…