Notes

Sam Sedgman ; illustrated by David Dean.

344 pages :

illustrations, map.
On cover: Can Isaac unearth Paris's deepest secret?
Summary: A gunshot rings out at the National Archives in Paris, and Isaac Turner's world is thrown into chaos. Dangerous forces are hunting the Forbidden Atlas. If they find it, Paris will never be the same. Isaac and his friend Hattie search for answers and are drawn into the sprawling tunnels beneath the city. But with ruthless treasure hunters on their tails, they must race to save Paris's long-buried secret - and the city itself.

Isaac Turner investigates.