"The Wager: A Tale of Shipwreck, Mutiny and Murder" is the latest book by David Grann, a best-selling author who investigates an 18th-century shipwreck saga. The book takes readers through the 1741 shipwreck of the HMS Wager, which occurred off the coast of Chile, forcing the crew to find refuge on a swampy, barren island. The sailors slowly descended into a "Lord of the Flies" type of chaos, with violent factions and some even succumbing to cannibalism. Grann tells the story of the court martial that followed and follows the "warring factions" in their fight for the truth. The book is called "a parable for our own turbulent modern times," and is already being adapted into a movie by Martin Scorsese and Leonardo DiCaprio. Grann is known for his deeply involved historical investigations and structures his narratives impeccably.