'Clever, inventive and a cracking read' - Eoin Colfer, author of Artemis Fowl A locked-room mystery packed with rooftop chases, hidden codes and mind-bending science, The Clockwork Conspiracy is a must for fans of the Adventures on Trains series and Sharna Jackson's High Rise mysteries. Aspiring inventor Isaac Turner lives with his dad, the Chief Horologist in charge of Big Ben. But when his father vanishes from the belfry on the night the clocks go back, leaving behind only a smashed pocket watch and a cryptic message, Isaac determines to find him. Hunting a trail of clues through London's landmarks, Isaac uncovers a sinister plot in the gears of government and embarks on a race against time to save his father – and time itself. 'An ingenious mystery full of fascinating facts. Sedgman has cracked the code for an absolute triumph of a book' – A.F. Steadman, author of Skandar and the Unicorn Thief 'The Clockwork Conspiracy offers a captivating and perilous adventure that surprises and delights at every turn' – Catherine Doyle, author of The Storm Keeper's Island 'A taut, tense mystery with perfectly-timed plotting, this is guaranteed to make the time fly' - Maz Evans, author of Who Let the Gods Out? 'THE CLOCKWORK CONSPIRACY is a fiendishly clever contraption, featuring brilliantly savvy characters and a well-wound plot that ticks along like – what else? – clockwork.' - Andy Sagar, author of Yesterday Crumb and the Storm in a Teacup 'A thrilling locked-room mystery, with a plot as beautifully engineered as clockwork.' - Pari Thomson, author of Greenwild: The World Behind the Door