The Child Slayer

Lask is gifted-or cursed-with the ability to see evil in a person's aura. The Order of Eldura recruited him to destroy evil, whether in the guise of a lowly peasant or high-born king. When an assassin comes to kill the high priestess of Lask's order, the young man finds himself tasked with killing a foreign emperor. To keep his High Priestess safe, Lask undertakes a journey that will lead him across oceans and through enemy lands.
Success requires he place his trust in Skylex, an enemy and recent convert to his religion. In her, Lask has either a guide who can take him straight to the emperor, or a spy. If Skylex betrays him, his exceptional skill with sword and dagger will prove useless. Everything he knows about the emperor tells him his death won't be easy. Worse than killing him, the emperor may keep Lask alive long enough to see the high priestess die and all he holds dear destroyed.
Warning: This book contains graphic sex and violence.