New York Times-bestselling author Aiden Thomas returns to the beloved world of The Sunbearer Trials in Celestial Monsters, a heart-stopping duology finale, in which three young semidioses travel through a dark monster-infested world, facing down chaotic Obsidian gods, in a quest to save their friends and return the sun to the sky.

Teo never thought he could be a Hero. Now, he doesn't have a choice.

The sun is gone, the Obsidian gods have been released from their prison, and chaos and destruction are wreaking havoc on Reino del Sol. All because Teo refused to sacrifice a fellow semidi