If you’re travelling to Berlin, you’d do well to read Erik Larson’s In the Garden of Beasts. Going to Chicago? Read his The Devil in the White City. However, if you’re going on a cruise, beware Larson’s latest-- and, I think, best-- book, Dead Wake. Larson combines impeccable research, fully drawn characters and social history to tell of a fateful journey when the rules of war became more dangerous for all people.