“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, Joe William Trotter Sr. and Thelma Odell Foster Trotter,...