G.S. Denning is the author of the acclaimed Sherlock-fantasy mashup series Warlock Holmes, including Warlock Holmes: A Study in Brimstone and Warlock Holmes: The Hell-Hound of the Baskervilles. His latest in the series, Warlock Holmes: The Sign of Nine. He has a background in improv and has performed with Ryan Stiles and Wayne Brady. He lives in Las Vegas with his wife and two children.