Leviathan

Leviathan is about an alternate history of World War I. There arew the allies, known as the darwinists, that use mutated animals. And the Germans and Austrians, known as the clankers that use big metal walkers. About half of the book is about the made up son of franz ferdinand, Alec, on the run from the clankers. Also Deryn Sharp, a young Darwinist thats eager to join the army but can not as she is a girl. She is far more skilled, eager and knowledgebul than any boy and so she pretends to be a boy. She then starts to serve on the leviathan a huge floating whale like creature, ut when it is shot down over the Alps. It is up to Alec and his closest friends to save them from the Germans, closing in to finish of the ship and freezing/starving to death in the cold.
I really enjoyed it and would recommend it to anyone that likes that kind of thing or is intersted by this report.
http://www.youtube.com/watch?v=PYiw5vkQFPw