The Ghosts of Idlewood (Idlewood #1)

When a team of historians takes on the task of restoring the Idlewood plantation to its former glory, they discover there's more to the moldering old home than meets the eye. The long-dead Ferguson children don't seem to know they're dead. A mysterious clock, a devilish fog and the Shadow Man add to the supernatural tension that begins to build in the house. Lead historian Carrie Jo Stuart and her assistant Rachel must use their special abilities to get to the bottom of the many mysteries that the house holds.

Detra Ann and Henri get a reality check, of the supernatural kind, and Deidre Jardine finally comes face to face with the past.

If you loved the Seven Sisters series, you'll enjoy the spinoff series, Idlewood.