They call it the Sunstone.

An ancient superweapon with the power to reduce cities to ash.

When a fleet of skyships emerges from the sandstorms—led by a captain determined to conquer the Badlands—Isiah is thrust into a desperate race to uncover the Sunstone’s secrets before the invaders beat him to it.

But unlocking its power will drag him into the mysterious spirit world… and force him to trust his dragon, Aegon, like never before.

Meanwhile, Lazaro returns to find Alcabaza in chaos. With rival gangs fighting over the remains of a city on the brink of collapse, their only hope to defeat the impending armada lies in uniting the Raiders and unlocking the ancient magic of the Sunstone.

Because if they fail, the Badlands will burn.