King Yin-Yang of Human Xanth is a man from the West Stockade in Xanth. His talent is creating invokable spells. He was first introduced in Crewel Lye: A Caustic Yarn.
Yin-Yang was delivered in 657. He was the widower of Threnody, husband of an unnamed woman, and father of Bliss. He was assassinated by Muerte A. Fid in 719. He was 62 years old.
Yin-Yang was the eleventh King of Human Xanth. He had a split personality with Yin, Magician of Light and good, and Yang, Magician of Darkness and evil. Yang became King of Xanth by winning a competition for the throne set by Gromden to determine which side of him would rule. He, along with his son and Warren, was assassinated by Muerte A. Fid.
Novels: Crewel Lye: A Caustic Yarn, Question Quest