The Forbidden Atlas

'Clever, inventive and a cracking read' - Eoin Colfer, author of Artemis Fowl, on THE CLOCKWORK CONSPIRACY
Isaac Turner's scientific know-how has saved the day once, but he is now faced with a whole new mystery to investigate.

When a vanishing boy runs off with a stolen letter, Isaac and Hattie become locked in a race to uncover the lost vault of Louis XVI, an adventure that will take them on a wild chase across Paris, from the Louvre to the catacombs.