Roderick Gordon

The outer crust is under attack by the subterranean Styx who are turning ordinary humans into walking bombs and incubators for their eggs, and only Will Burrows and his band of retired commandos stand in their way--but the Styx also have problems of their own.

At long last reunited with his dad, Will now spends his days exploring the "land of the second sun," decoding the cryptic glyphs carved into its three mysterious temples--or eyeing the wild animals with renegade girl Elliott. Chester, meanwhile, has finally returned Topsoil, where his homecoming is rapidly becoming a horror show. But an army of darkness is on the march. And the ruthless Rebeccas have once more cheated death. With a corps of cold-blooded Limiters at their command, they're determined to hunt Will to the bitter innards of the earth. This time, who WON'T escape with their life?

"Styx and their cohorts of deadly Armagi have swept across England, leaving death and devastation in their wake. Only a miracle can save the day and, in the inner world at the centre of the earth, Will and Elliott might just have stumbled upon one as they uncover ancient secrets that are fundamental to all human and Styx life"--