Bleeding Kansas by Sara Paretsky
The Grelliers and the Schapens are two families who have been farming in the Kaw River Valley for over a hundred and fifty years, their lives connected through the generations by history and geography. Gina Haring, bringing with her the liberal air of the big city, moves into a dilapidated house near both families' properties. Gina has secrets, her own reasons for being in the Kansas countryside, and they're not necessarily what the people around her imagine. Susan's involvement with her stirs up the wrath of the Schapen clan -- and has cataclysmic results for her own family.