Joseph Nassise is the New York Times, USA Today, and Der Spiegel bestselling author of more than sixty-five books of military urban fantasy and supernatural thriller fiction, including the internationally bestselling TEMPLAR CHRONICLES series, the JEREMIAH HUNT trilogy, and the GREAT UNDEAD WAR series. His work blends the firepower, camaraderie, and squad-based tactics of military fiction with monster hunting, secret orders, and occult warfare — a good fit for readers of Jim Butcher, Ilona Andrews, Larry Correia, and Jonathan Maberry. He also writes epic fantasy under the pen name Matthew Caine and a new take on the Arthurian mythos under the pen name Rowan Casey.

His work has been nominated for both the Bram Stoker Award and the International Horror Guild Award and has been translated into half a dozen languages to date. He has written for both the comic and role-playing game industries and also served two terms as president of the Horror Writers Association, the world's largest organization of professional horror and dark fantasy writers.