I have started reading "Behemoth", which is apparently the second book to the Leviathan trilogy, the third book being "Goliath". This book is a continuation on the events that occurred in the first book, and it still appears to follow the story of Deryn Sharp and Prince Aleksander. They are traveling in a giant whale airship on it's way to Constantinople on a secret diplomatic mission. Deryn still has to hide the fact that she is a girl; and although Dr. Barlow, Deryn, and those who fled with Aleksander know his secret, it is still one that he has to keep unknown. A grudging alliance had been formed between the crew on the Leviathan and the small band of fleeing Clankers. As a result, Deryn and Alek are found on the Leviathan at the beginning of the book; but the technology on the airship has been combined with the Clanker technology that Aleksander and his party used. As a result, the airship moves much more quickly than it did when powered by the Darwinist engines. I do not want to give away any more, as it may spoil the plot and events that occur later on in the book, but so far I find this book, and the series as a whole, a very enjoyable read.