Flashback by Nevada Barr

When National Park Ranger Anna Pigeon takes a temporary assignment at Dry Tortugas National Park—a cluster of remote islands off the coast of Florida—she expects isolation and peace. But when a mysterious death shatters the calm, Anna is drawn into a chilling mystery that spans centuries. As she uncovers hidden secrets buried in the old fortress walls, letters from the Civil War era intertwine with the present, revealing betrayal, obsession, and murder. In this gripping and atmospheric thriller, Nevada Barr delivers a haunting tale where history’s echoes refuse to stay silent.