Mrs. Quigley's Kidnapping — Jean Sheldon

When Mattie Draper opened her Chicago detective agency in 1968, she was one of only a handful of female Private Investigators nationwide. For the first six months, her cases offered no greater challenge than finding lost pets and wayward spouses-until someone kidnapped Diana Quigley. In a race to find the missing woman, Mattie tries to untangle the helpful information supplied by a growing lists of suspects.