Murder at Maltby le Marsh (A Harlowe & Fitch Historical Mystery Book 3)

A graveyard ghost leads investigators to a corpse hidden in an abbey's wall.
When Sheriff Zachariah Fitch hears about a corpse found inside the wall of Maltby le Marsh Abbey, he wants nothing to do with the investigation since that is where his estranged sister resides as a nun. But with the local constable asking for his help, and Lady Vivienne accepting the case for them, he quickly finds himself not only working on a murder, but having to face his ghosts of the past involving his sister.
Lady Vivienne Harlowe has helped the sheriff on several cases. So when a ghost in the graveyard seems to be summoning her, she takes it as a sign that she and the sheriff must travel to Maltby le Marsh to assist with a new murder investigation. Zachariah is her good friend from childhood, and as both of them have lost their spouses, a growing attraction between them makes her wonder if they can keep their relationship professional as they've always agreed to do.