Barack Obama has shared what he’s reading this season. The former president and bestselling author continued his annual tradition of giving book recommendations with the release of his eagerly anticipated summer reading list. Among them are “The Wager: A Tale of Shipwreck, Mutiny and Murder,” David Grann’s new nonfiction book about an 18th-century shipwreck ― which is on Amazon’s list of the best books of the year (so far) ― and Jonathan Eig’s new biography of Martin Luther King Jr., “King: A Life.” New Zealand novelist Eleanor Catton’s psychological thriller “Birnam Wood” and Tiffany Clarke H...