The Secret Abyss

A DEADLY ASSASSIN. 
A MYSTERIOUS WEAPON. 
A NATION ON THE BRINK OF WAR. 

When the world's deadliest assassin - The Chameleon - escapes from a high-security prison in the English countryside, Jack and his friends vow to track him down in their most dangerous case yet. 
Travelling to New York, a bustling city filled with airships, steamcars and exciting new ideas, they uncover a dangerous plot that threatens the president's life and brings the nation to the brink of civil war. 
Can Jack track down the Chameleon in time? And just what is the mysterious Whip of Fire that has the power to wreak destruction across the globe?