This image is the cover for the book Branded

Branded

When a would-be assassin sneaks into the citadel disguised as a servant, the king requires that all servants who work in the castle be branded with the royal crest for easy identification. Prince Coren is powerless to fight the edict, but he refuses to allow his personal advisor and secret lover Brannir to suffer alone. Coren shows his devotion by wielding the brand to mark Brannir himself, even though he fears it will change their relationship. He's prepared for resentment, hurt, and anger--every outcome but the one he receives: unconditional love.

Bru Baker