Alek and Deryn are abroad the Leviathan when the ship is ordered to pick up an unusual passenger This brilliant/maniacal inventor claims to have a weapon called Goliath that can end the war But whose side is he really on? While on their top-secret mission, Alek finally discovers Deryn&39;s deeply kept secret Two, actually Not only is Deryn a girl disguised as a guyshe has feelings for Alek The crown, true love with a co on Alek&39;s next--and final--move The thunderous conclusion to Scott Westerfeld&39;s Leviathan series, which was called "sure to become a classic" (SLJ)