Goliath: Leviathan Trilogy, Book 3

The afterward reminds viewers that this series is an "alternate history," and takes place during World War I. In this installment, the United States is close to entering the war. Historical figures including electrical engineering pioneer Nikola Tesla, newspaper publisher William Randolph Hearst, and Mexican revolutionary Pancho Villa have major parts to play. Real events -- such as a mysterious explosion in Siberia -- and real inventions -- such as the "death ray" Tesla hoped to create -- are key components of the story. Readers will also learn a bit about rival newspapers of the time, physics, early filmmaking, the Mexican Revolution, radio waves, magnetic fields, geography (the Leviathan goes from Siberia to New York), and even the use of semaphore flags.

Deryn is as brave as always, and still determined to hide the fact that she's a girl in order to serve her country. She stops keeping secrets from Alek, however. With Deryn's help, Alek finds his place in the world, no longer feeling personally responsible for the course of the war.

A couple kisses and Deryn tries to keep a doctor from removing her shirt when she's injured so he doesn't find out her secret.

Mention of the real movie serial The Perils of Pauline.