Murder on Frequency - Patricia Wood Smith

There’s nothing unusual about a ham operator contacting other radio enthusiasts. Unless he’s been dead for five years. When Harrie McKinsey and Ginger Vaughn - who have been described as the Lucy Ricardo and Ethyl Mertz of murder mystery - decide to study for their ham radio licenses, they get pulled into this mystery and find a trail leading to a long-lost treasure somewhere in New Mexico. Before it’s over, there’s another murder, an abduction, and a showdown with an aging Mafia don who values treasure more than human life. Harrie, Ginger, and their merry band of FBI, APD, and private detectives have to be on their toes to prevent another murder and save a family.