Goliath (tercera parte de la trilogía Leviathan) (Spanish Edition)

Alek and Deryn are aboard the Leviathan when Deryn receives orders to pick up a brilliant, insane inventor who swears he has a weapon named Goliath, which is sure to put an end to the war. What side is he on? While they are on this dangerous mission, Alek finally discovers the secret Deryn has been trying to keep.