Waggoner has published over thirty novels and three collections of short stories. He writes fantasy and horror, as well as media tie-ins for properties including Supernatural, Grimm, the X-Files, Doctor Who, A Nightmare on Elm Street, and Transformers. He is also a full-time tenured professor who teaches creative writing and composition at Sinclair College. In 2017 he won the Bram Stoker Award for Best Long Fiction with The Winter Box.