Here are four hard-boiled detective short stories set in contemporary San Antonio, Texas. Nacho Perez, a former Marine drill instructor, uses his fists and his gun to get to the bottom of his cases. But he takes his lumps along the way.
In "Badger Game", Nacho tries to recover money lost in a confidence scheme. In "San Antonio Blues", he investigates a death written off by the police as an accidental drug overdose. "Search of El Dorado" involves finding an heir to a fortune that the mob doesn't want found. "Whiskey's for Drinking" concerns a dispute over water rights in South Texas.
As a bonus, the collection ends with a flash-fiction detective story set in a futuristic New York City. The outcome turns on Asimov's First Law of Robotics.