Ralph Compton Flames of Silver (The Sundown Riders Series)

Thanks to the discovery of the Comstock Lode, Virginia City, Nevada, has made many a rough-hewn millionaire. It seems like everyone is looking to strike it rich, but to Morgan Mason, the real prize is being selected as one of the volunteer firemen. Recently inducted into the fire brigade, Mason is called to put out a blaze and stays to investigate its cause. His searing discovery? The fire was no accident - it was deliberately set. Mason knows he is the only one who can take the heat and catch the crooks before the wealth of the entire town goes up in smoke.