"After saying our good-byes to friends and neighbors, we all got in the cars and headed up the hill and down the road toward a future in Ohio that we hoped would be brighter," Otis Trotter writes in his affecting memoir, Keeping Heart: A Memoir of Family Struggle, Race, and Medicine. Organized around the life histories, medical struggles, and recollections of Trotter and his thirteen siblings, the story begins in 1914 with his parents,...