Alek and Deryn are on the last leg of their round-the-world quest to end World War I, reclaim Alek's throne as prince of Austria, and finally fall in love. The first two objectives are complicated by the fact that their ship, the Leviathan, continues to detour farther away from the heart of the war (and crown). And the love thing would be a lot easier if Alek knew Deryn was a girl.

After rebel Tally Youngblood brings down the uglies/pretties/specials regime, fame, instead of beauty, becomes the new world order, and fifteen-year-old Aya Fuse embarks on a dangerous plan to boost her popularity ranking.

"Frey has spent her life in a family of deceivers, a stand-in for her sister, manipulated at her father's command. Free from them at last, she is finding her own voice -- and using it to question everything her family stood for. Tally was once the most famous rebel in the world. But for over a decade, she's kept to the shadows, allowing her myth to grow even as she receded. Now she sees that the revolution she led has not created a stable world. Freedom,...

Continues the story of Austrian Prince Alek who, in an alternate 1914 Europe, eludes the Germans by traveling in the Leviathan to Constantinople, where he faces a whole new kind of genetically-engineered warships.

Tally's perfect life as a Pretty is disrupted when she receives a letter from herself, written when she was an Ugly, reminding her of the promise she made to take a drug developed to cure the brain lesions that keep the Pretties shallow and happy--and when she takes the pills, she becomes a target of those determined to keep Pretty society carefree.

As they celebrate the opening of their underground nightclub, the Zeroes, six teenagers with unique abilities, learn about the sinister power of Swarm, who uses a crowd's rage to kill--and who loves killing Zeroes.

Assuming her twin's identity, Frey works to destroy her father. When a rebel uprising strands her in Pas, and the city comes under attack, Frey must step out of the shadows to find her missing sister and take action against her tyrant father.