Goliath is a biopunk/steampunk novel by Scott Westerfeld, and illustrated by Keith Thompson. The novel is the third and final installment in the Leviathan series after Behemoth, released on September 20, 2011.
Heir to the Austro-Hungarian throne in hiding Prince Aleksander, and Scottish midshipman Deryn "Dylan" Sharp rescue Serbian inventor Nikola Tesla from the site of a 1908 Siberian Tunguska event meteorite blast. Along the way, Alek sees through Deryn's male disguise of Dylan on the organic airship Leviathan while gradually learning of Tesla's motives of using his invented weapon Goliath to end the war on his own. Alek destroys the inventor and his Goliath weapon under German attack in New York, triggering the entry of U.S. into World War I.
Plot
As the airship Leviathan travels over Russia, Aleksandar, Deryn, and Newkirk are in the middy's mess with the perspicacious loris Bovril, talking about great circle routes. Alek mentions Deryn's father was an airman, but Newkirk says that the airman was Deryn's uncle. A living two-headed messenger eagle from the Czar heads towards the bridge, interrupting their discussion. A message lizard sends Deryn to the bridge and Newkirk to the cargo deck. Alek goes with Deryn, and there, Dr. Barlow tells them to take the bird to the rookery and feed it. Deryn nearly confesses her secret to Alek, but hesitates to do so thus resisting herself. She quickly asks for a fencing lesson to cover it up. Count Volger tries to expose her gender unless she discloses the imperial message, but drops the attempt after some convincing from Deryn, who dares not to shake the confidence of Alek, who admires 'Dylan' unaware of her masquerade as a boy.
The imperial message is to pick up a crate from the back of a fighting bear, but it is much heavier than expected, overloaded by metal parts and tools, and drags Deryn and Newkirk down into the trees until the crew manages to compensate by dumping clart (waste water) and other supplies. Dr. Barlow orders Alek, Klopp, Hoffman, and Bauer to assemble the metal contraption and keep it secret. The loris shows them how it detects metal with Barlow's necklace.
Flying over Tunguska, Siberia, they notice the area has been destroyed, trees have been flattened and point in one direction, and many stripped corpses are present, including that of another organic airship. By dropping dried beef at a distance to distract giant starving fighting bears, they rescue Nikola Tesla, his Russian soldiers and airship crew, who are holed up near the center of the destruction. Tesla's electrified fence, which had kept the bears away, is deactivated to allow the Leviathan to land, so he scares off the rogue bears with his electrified walking stick.
Later at night, as Alek is unable to fall asleep, he reads a newspaper article about "Dylan" and the Dauntless by Eddie Malone. He realizes something is off about the story Deryn has told him about her family and past: Artemis Sharp had a surviving daughter named Deryn. Alek eventually becomes tired and fells asleep, with Bovril whispering "Mr. Deryn Sharp" into Alek's ear. Not long after, Dr. Barlow requests Alek and Deryn to use Tesla's device to pinpoint the inventor's bedroom. Deryn sneaks into the room and discovers a metal lump hidden under Tesla's bed, and scrapes off a sample that they discovered to have magnetic properties. Amidst their discussion, Alek takes up the chance of asking her, "Can I trust you, Deryn?" to which she spontaneously responds, and Alek leaves the room hiding his disappointment. Deryn, immensely shocked at the realization of Alek knowing her true identity, chases after him and they get into an argument. As the pressure eventually recedes and Deryn leaves him alone, Alek considers the fact that Deryn might have hidden her real identity out of her love for him.
For a few days, Alek and Deryn are not on speaking terms. Alek decides to support Tesla in his mission to end the war with his magnetic beam, the Goliath, but sadly misses Deryn; who meanwhile is angry of his dismissal of her just because she is a girl. Sent to Tokyo just to brandish the British flag, the Leviathan battles an Austrian ship and two German zeppelins in support of the Japanese. When one of the engines is shot, both Deryn and Alek arrive to help, and Alek admits he wants Deryn back as his friend. When Dr. Barlow wants Deryn to get new clothes, Alek saves her from discovery being measured by offering himself to the tailor's hands.