A New York Times Bestselling Author -- The Leviathan arrives in Constantinople, a city where Clanker culture and Darwinist principles intersect in the most intriguing ways. Dr. Barlow and Deryn deliver their precious cargo to the Sultan, but their peace-keeping mission goes unexpectedly -- and disastrously -- awry. Now the only way to save themselves in this hostile, politically-charged city, is for Dr. Barlow to offer up the thing that matters most: the airship.
