Pima Gallagher, a detective for the Southern Pacific Railroad in 1894 Tucson, Arizona, must try to keep his landlady's eleven-year-old daughter, Scout, out of trouble while he investigates possibly intertwined cases of murder, arson, robbery, rape, and kidnapping.

A traveling medicine show comes to Tucson, Arizona in January 1895. What, if anything, does its arrival have to do with a body found lying next to the railroad tracks just north of town? Southern Pacific Railroad Detective Pima Gallagher and his eleven-year-old stepdaughter, Scout Walker, eventually succeed in solving several related murders, and nearly become victims in the process.

A central Arizona deer hunting excursion in late 1895 is complicated by murder. Southern Pacific Railroad Detective Pima Gallagher and his 12-year-old stepdaughter, Scout Walker, nearly perish in a blizzard while chasing outlaws who just might be the killers. Scout, afraid she’s going to be accused of the murder, runs away to an old mission to hide until a most unexpected person confesses.

A 16-year-old boy or a 13-year-old girl? Runaway Scout Walker hides out in Bisbee, Arizona in the autumn of 1896. Southern Pacific Railroad Detective Pima Gallagher, while trying to solve a perplexing shipping issue, must locate his stepdaughter before she becomes the victim of a fatal mining accident.

Southern Pacific Railroad Detective Pima Gallagher; his stepdaughter, Scout Walker; and close friend, José Gonzales, face peril in the Arizona desert while trying to track down Ellen Gallagher and Maria Gonzales, hostages of a hired killer. Meanwhile, in Tucson a wealthy Mexican is murdered, but who killed this much-hated man?

Southern Pacific Railroad Detective Pima Gallagher is asked by the Santa Fe Railroad to help track down smugglers of whiskey to the Navajo Reservation. His 15-year-old stepdaughter, Scout, who is trying to write her memoirs, drags her mother, Ellen, to Winslow when Pima disappears. There they get involved in solving the murder of a Harvey Girl and tracking down outlaws in the Petrified Forest.