BOOK FOUR IN THE HUGELY SUCCESSFUL TUNNELS SERIES BY RODERICK GORDON AND BRIAN WILLIAMS
At the centre of the Earth, in a world that no one knows exists, Will is in trouble.
His enemy, the Styx, are close behind. They'll pursue him to the ends of the world – any world. Meanwhile, Drake – with help from the unlikeliest of allies – is preparing to fight the Styx from above. But will his daring plan bring him closer to victory ... or to certain death?