A masterful, compelling story from an award-winning author, this is the anniversary edition of a story every child and parent will love.Lucas is lonely. Orphaned and sent to live with his formidable guardian in a vast mansion, he longs for a friend.Then Anna-Marie arrives. She's spoilt and wilful - and practically half his age. Lucas feels more alone than ever.But one night something terrible happens. Lucas and Anna-Marie face a terrifying and treacherous ordeal, alone in the hostile city streets. Together, they must fight to survive ...The 40th anniversary edition of a compelling tale of villainy and suspense - from the best-selling author of THE WOLVES OF WILLOUGHBY CHASE.