When a series of murders are blamed on a Zulu delegation visiting Eton College, Alexander Armitage and his friends chase the real assassin from the cobbled streets of London to the great deserts and savannahs of Africa. Alexander Armitage is back in the thrilling sequel to IRON HORSEMEN. It's been almost a year since he saved London, and life has returned to the structured days at Eton College, a place he still doesn't fit in. When a series of murders strike campus, they are blamed on the visiting Zulu delegation. But Alexander has doubts. In his search for the truth, he finds himself embroiled with the baron's daughter's dark past as they are captured and taken by armored Milli-train to the hidden city of the sky pirates. The chase is on, from the cobbled streets of London, to the great deserts and savannahs of Africa. In a steam-powered Victorian world where pirates prowl the sky and secret societies determine the future like a game of chess, Alexander learns the difference between what is savage and what is noble, while discovering the power within himself.