Moonlocket (The Cogheart Adventures #2): 1

When infamous escapologist Jack Door breaks out from Pentonville Prison, he sets out for the town of Brackenbridge, determined to find his missing treasure - the Moonlocket. But when Lily and Robert unwittingly find themselves caught up in Jack Door's search, they discover that Robert's history holds the secret to the Moonlocket's whereabouts... A thrilling tale of catastrophe and courage... The exhilarating second Cogheart Adventure: the bestselling series of fantastical imagination set in a gripping Victorian world, from award-winning Peter Bunzl.It's hard to escape the secrets from the past.Storm clouds gather over Lily and Robert's summer when criminal mastermind the Jack of Diamonds appears. For Jack is searching for the mysterious Moonlocket - but that's not the only thing he wants.Suddenly, dark secrets from Robert's past plunge him into danger. Jack is playing a cruel game that Robert is a part of. Lily and Malkin, the mechanical fox, must stay one step ahead before Jack play his final, deadly card..."I raced through it... A must-read for all fans of adventure - children or not." Kiran Millwood Hargrave"A 'tockingly' good steampunk mystery." Kirkus "Adventure by the spadeful!" ReadingZone"A spellbinding sequel, a roller coaster journey full of catastrophe, buried secrets, breathtaking courage and intrigue." Lancashire Post