Beasts Made of NightBook - 2017
Taj is a talented aki, or sin-eater, who consumes the guilt of others: the transgressions are exorcised by powerful but corrupt Mages as "sin-beasts." After Taj eats the sin of a royal he is drawn into a plot to destroy the city. Now he must fight to save the princess he loves-- and his own life.
From Library Staff
Fantastical elements in this story have mages (aki) who purify the monarchy by eating their sins. Sins can take the form of shadow beasts and tattoos. The main character one of the best aki, Taj, gets drawn into a possible coup that could take his life and the life of his love.