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BOOK THREE IN THE HUGELY SUCCESSFUL TUNNELS SERIES BY RODERICK GORDON AND CO-AUTHOR BRIAN WILLIAMS.After Deeper, can the Tunnels adventure get any more dangerous? And where will it end?Will Burrows and his gang are far from finished as they free-fall down a subterranean pore. As they experience reduced gravity, the dark mysteries of the deep unfold and they discover a strange fungal shelf, which not only reveals artefacts from ancient civilisations, but clues to a lost land at the end of the Earth.