Publisher's Synopsis
Peter Grant is learning magic fast. And it's just as well - he's already had run ins with the deadly supernatural children of the Thames and a terrifying killer in Soho. Now something horrible is happening in the labyrinth of tunnels that make up the tube system that honeycombs the ancient foundations of London. And delays on the Northern line is the very least of it. Time to call in the Met's Economic and Specialist Crime Unit 9, aka 'The Folly'. Time to call in PC Peter Grant, Britain's Last Wizard.
