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?

 

There are 385 pages in this book. This book was published 2012 by Scholastic .

Brian Williams is an editor and the author of many childrens books. He is the coauthor of "Amazing Animal Families. "