This week’s Unshelved Book Club features books that are worthy of book club discussions. They include books about using improvisation techniques to improve creativity and collaboration, Haiti after the 2010 earthquake, a surgeon’s reflections on the end of life in the developed world, a young Finnish teacher who joins an exclusive literary society and discovers a mystery, a cranky old man, Europe during World War II, essays on the benefits and controversies surrounding vaccination, and three historical stories that intersect in Cuba.