Felix lives in a convent orphanage high in the mountains in Poland. He is convinced his parents are still alive and that they will one day come back to get him. When Nazi soldiers come to the orphanage Felix decides to escape and make his way home. The journey to find his parents is a long and difficult one, as all of Poland is occupied by the Nazis and a dangerous place for a Jewish boy.

While Ellie and her friends are away in the bush, the world changes. Suddenly they are in the toughest situations humans can confront, facing life and death decisions. They are thrown into a world where they find courage, initiative, spirit and wisdom, or they die.

It is the cusp of World War I, and all the European powers are arming up. The Austro-Hungarians and Germans have their Clankers, steam-driven iron machines loaded with guns and ammunition. The British Darwinists employ fabricated animals as their weaponry. The Leviathan is a living airship, the most formidable airbeast in the skies of Europe.

In a discontented kingdom, civil war is brewing. To unify the divided people, Conner, a nobleman of the court, devises a cunning plan to find an impersonator of the king's long-lost son and install him as a puppet prince. Four orphans are recruited to compete for the role, including a defiant boy named Sage. Sage knows that Conner's motives are more than questionable, yet his life balances on a sword's point - he must be chosen to play the prince or he will certainly be killed. But Sage's rivals have their own agendas as well.

Twelve-year-old Trace Reynolds has always looked up to his brother, mostly because Will, who's five years older, has never looked down on him. It was Will who taught Trace to ride a bike, would watch sports on TV with him, and cheer him on at Little League. But when Will was knocked out cold during a football game, resulting in a brain injury - everything changed. Now, 17 months later, their family is still living under the weight of "the incident" that left Will with a facial tic, depression, and an anger he cannot always control, culminating in their parents' divorce.