A new look for the first book in Roderick Gordon and Brian
Williams's bestselling series!

Fourteen-year-old Will
Burrows lives with his family in London. He has little in common
with them except for a passion for digging which he shares with
his father. When his father suddenly disappears down an unknown tunnel,
Will decides to investigate with his friend Chester. Soon
they find themselves deep underground, where they unearth a dark
and terrifying secret - a secret which may cost them their lives
...