The Yellow King

From publisher blurb: DEATH CULTS! ARCANE SECRETS! AND WEIRD SCIENCE! Known variously as The Yellow King, The Heavenly Shepherd, or The Repairer of Reputations, this villain is the secret godfather behind the most important occult organizations of the world. Legends say the Yellow King is not human; some claim that he is a member of an alien race stranded on Earth centuries ago, and through the years has amassed near-infinite knowledge and power. In myth and legend, he is frequently portrayed as a tall man seated upon a shining throne, clad in a yellow robe, his features obscured by a cowl. Whatever the true nature of the Yellow King: No matter where you hide... He will find you!