Razing the Dead by Sheila Connolly

Once again Nell Pratt has to dig into the past to solve a murder in the present...

Between the challenges of her position as president of the Pennsylvania Antiquarian Society in Philadelphia and of taking her relationship with FBI agent James Morrison to the next level, Nell Pratt has got her hands full. Nevertheless, when a powerful developer approaches the Society to make sure the old dairy farm he wants to level is not hiding any archaeological or historical surprises that could derail the project he’s planning, Nell decides to make time to personally accompany him to the proposed site.

But when they get to the property, they stumble upon a startling discovery—a body floating facedown in a pond. The dead man turns out to be an amateur history enthusiast, who may have uncovered secrets about the farm that got him killed. Now it’s up to Nell and James to get to the bottom of things before there are more deadly developments...