Four generations ago, Earth was rendered uninhabitable; the sun too hot, the land too barren. Those who survived were forced underground, where civilization divided into compounds. In Compound Eleven, only the cruel survive. Fighting is entertainment, violence is a way of life, and hierarchy between the floors is everything. Sixteen-year-old Eve Hamilton may have been born on the second floor, but she was born to survive, and freedom means everything if it means protecting someone she cares about most. There’s a rumor not all who go above die, but there is only one way to escape Compound Eleven—and it is not for the faint of heart. The only one standing in her way? The privileged Wren Edelman: mysterious, infuriating, persistent, and shockingly handsome. Except relationships between floors aren’t just nonexistent—they’re dangerous. And there’s plenty more to fear in Eleven. Because suddenly, falling for the wrong boy is the least of her concerns. If she doesn’t make it to the surface soon, everyone she cares about could die.