In a near-future New York City, fourteen-year-old computer genius Sam Wilson manages to hack into the AT&T network and sets off a chain of events that have a profound effect on human activity throughout the world.

In an alternate 1914 Europe, fifteen-year-old Austrian Prince Alek, on the run from the Clanker Powers who are attempting to take over the globe using mechanical machinery, forms an uneasy alliance with Deryn who, disguised as a boy to join the British Air Service, is learning to fly genetically-engineered beasts.

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.

Alek and Deryn encounter obstacles 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.

"While serving as a superhuman government weapon during World War III, teenager Tom Raine's loyalties are tested by corruption and nefarious enemies"--

Tom, a fourteen-year-old genius at virtual reality games, is recruited by the United States Military to begin training at the Pentagon Spire as a Combatant in World War III, controlling the mechanized drones that do the actual fighting off-planet.

Fourteen-year-old Bobby, living in a small Massachusetts town just after World War II, finds himself facing many new challenges as he tries to pull together his coachless basketball team, cope with new feelings for his old friend Joanie, and discover the identity of the mysterious stranger who seems to be threatening his teacher.

"Some things are worth fighting for. Of all his friends, Ivan is the only one looking forward to war. That's because Ivan has never backed down from a fight--especially when it comes to fighting for what's right. He has protected his friends from bullies for years. And now, as war erupts in Vietnam, Ivan wants nothing more than to fight for his country, just as his father did in World War II. Enlisting in the United States Army, Ivan is trained to...

Rudi is a newly drafted United States Marine in Vietnam, and he likes being part of a squad--but the way some of his fellow soldiers behave toward their officers, the Vietnamese, and the war itself, is starting to trouble him.

Crater Trueblood, doubting the justice of the war he fights and the evil of enemies he was trained to hate, brings Crescent, an apparently female Crowhopper, to Moontown as his prisoner but soon both are fugitives, fleeing prejudice and cruelty in hostile territory.