One competition to free humanity--or enslave it forever.

Cora and her friends have escaped the Kindred space station and landed at Armstrong, a supposed safe haven on a small moon. There, they plan to regroup and figure out how to win the Gauntlet, the competition to prove humanity’s intelligence and set them free. But Armstrong is no paradise; it’s ruled by a power-hungry sheriff, and the teens are enslaved and put to work in mines. As Nok’s due date grows closer, Mali and Leon journey to rescue Cassian, the alluring Kindred guard who betrayed yet captivated Cora.

Cora’s feelings for Cassian intensify, and their forbidden romance becomes a beacon of hope and conflict. With the universe at stake, Cora will do whatever it takes to escape Armstrong and run the Gauntlet, but she faces opposition from rival alien factions. Trusting her heart, Cora must navigate love and danger to win the competition, which could change the world—or destroy her.

The final book in the New York Times bestselling The Cage series sets love and freedom at war in a sky ravaged by injustice.