Freefall

After DEEPER, can the TUNNELS adventure be 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 artifacts from ancient civilisations,
but clues to a lost land at the end of the Earth.

The third in the thrilling Tunnels series - an international publishing
sensation.