Hawk accepts her mother Max's help to prevent vengeful hybrids, amoral scientists, traitorous politicians, and a deadly virus from overwhelming her beloved, polluted city.

In a future where genetic engineering has cured humanity of all diseases and defects but has also produced a virus that kills all females by age twenty and all males by the age twenty-five, teenaged Rhine escapes her forced marriage and journeys back to New York to find her twin brother.

After modern science turns every human into a genetic time bomb with men dying at age twenty-five and women dying at age twenty, teenaged Rhine finds hope for a brighter future from a surprising source.

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.

Cat thought the Hydra epidemic was over, but when new cases arise, she must team up with an enemy to fix the vaccine before the virus spirals out of control.

Dahlia thinks all of her clones have been destroyed, but then discovers that one still exists--Waverly Whitmore, who is teenage royalty, a media sensation with millions of fans--who has no idea that she is a clone.

Max boldly navigates post-apocalyptic regions with her broken flock in search of answers about what has happened to their world.

Ever since the government passed legislation allowing people to be genetically engineered and raised as pets, the rich and powerful can own beautiful girls like sixteen-year-old Ella as companions. But when Ella moves in with her new masters and discovers the glamorous life she's been promised isn't at all what it seems, she's forced to choose between a pampered existence full of gorgeous gowns and veiled threats, or seizing her chance at freedom...

The only way sixteen-year-old Nate, a Genetically Engineered Metatissue, can get life-saving medication is to work for a shadowy terrorist organization, which would mean leaving the boy he loves.

Six unforgettable kids -- with no families, no homes -- are running for their lives. Max Ride and her best friends have the ability to fly. And that's just the beginning of their amazing powers. But they don't know where they come from, who's hunting them, why they are different from all other humans...and if they're meant to save mankind -- or destroy it.