Summary
The story is about a boy whose parents get killed to start World War I, and the people who killed them want to kill him. He flees his country which he is the actual ruler of and hopes to escape to Switzerland. Meanwhile a girl disguises herself as a man and gets herself on board the famous air beast, the Leviathan. Which later gets attacked by German soldiers, and they all crash in Switzerland. Both parties meet and help each other out and they both get out of Switzerland for some reason. You have to read the book to find out the rest.