Sequel to: Tunnels. "Includes bonus brand-new pages about the viral plague [7 p.], plus a sneak peek at Freefall, the next book in the series" -- Cover, p. [4].
Summary:
As young archaeologist Will Burrows continues to search for his lost father in the strange underground world he has discovered beneath the city of London, he stumbles across a sinister plot with terrible implications for the world above.
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