United States, Historical, Alternate History 

From the author of the bestsellers The Emperor of Ocean Park and New England White, an electrifying and provocative historical novel set in an alternate history in which Abraham Lincoln survives assassination at Ford’s Theatre on April 14, 1865. In this gripping legal and political thriller, Stephen L. Carter imagines what might have happened if Lincoln had lived to face the tumultuous post-war politics of 1865 Washington, D.C., including an impeachment trial for overstepping his Constitutional authority during the Civil War. At the novel’s center is Abigail Canner, a young black woman recently graduated from Oberlin, who is hired by the D.C. law firm that is working on Lincoln’s defense. When one of Lincoln’s lead lawyers is found brutally murdered, Abigail is plunged into a web of intrigue, politics, and conspiracy. - from Amzon