The Bone Tree by Greg Iles

Set in the deep South, this gripping thriller follows Penn Cage, a former prosecutor turned author, as he delves into a web of corruption, racial tension, and long-buried secrets. As he investigates the mysterious disappearance of his father, a respected doctor, Penn uncovers connections to a notorious civil rights murder and a sinister conspiracy involving the Ku Klux Klan. With danger lurking at every turn, he must navigate a treacherous path to uncover the truth and protect those he loves, all while confronting the dark legacies of the past.