Agatha Raisin is a frustrated, yet endearing, PR agent who retires from London to Carsley village in the Cotswolds, English Midlands and solves murders. In the first book, Agatha Raisin and the Quiche of Death (1992), Agatha is 53, and ages slowly, setting up her own detective agency in Agatha Raisin and the Deadly Dance (2004). Police, even her friend Bill Wong, see more bumbling luck than skill.
http://www.agatharaisin.com