The Posadas County Mysteries is a series of western-themed mystery/police procedural novels by American novelist Steven F. Havill. The first nine novels of the series follow Bill Gastner, who starts off as Undersheriff of Posadas County, New Mexico. Since then, the novels follow Undersheriff Estella Reyes-Guzman following Gastner’s retirement.


Steven F. Havill is an American author of mystery and western novels. He is best known for his Posadas County Mysteries series, which is also known as the Undersheriff Bill Gastner series. Havill got his B.A. and M.A. from the University of New Mexico and teaches high school biology. He lives in New Mexico with […]