Seventeen-year-old Taj is the most talented sin-eater indentured by the Guild, a ruthless organisation of Mages that runs a lucrative trade absolving the rich. In the walled city of Kos, Mages have a dark magic that allows them to call forth sin from a sinner in the form of sin-beasts - lethal creatures spawned from feelings of anguish and guilt. Every time Taj slays a sin-beast, an image of the beast scars his skin while the guilt of committing the sin scars his mind. Most sin-eaters can’t take it, driven mad by the process. But Taj is gifted and cocky and desperate - his family depends on his wages, and he’s willing to risk everything for them. Until Taj is hired to do a job that even he can’t follow through on. Soon, Taj realises that some sins should never be Eaten. When he stumbles upon a dark plot to destroy the kingdom, Taj must fight to save the princess he loves - and his own life. Debut author Tochi Onyebuchi delivers a haunting and powerful story of loyalty, survival, and heart-pounding adventure.