The Mudflats of the Dead (Mrs. Bradley Series 56)

Young schoolmaster-turned-author Colin Palgrave seeks inspiration for his second novel among the dunes and beaches of Saltacres, where he plans to spend his holiday. He encounters one rather forthright character straight away, and that in the form of 20-year old Camilla Hoveton St. John, a vacationing art student. After some undisguised flirting, Camilla invites Palgrave to stay with her and two others at a beachfront rental, and Palgrave warily accepts. All goes well until the early arrival of the next week's tenants: Colin is surprised to find Morag Lowson, to whom he was once engaged, with her doctor husband and luggage in tow.