In 1950, Ernest Hemingway was the most famous writer in the world, and he faced intense expectations for a masterwork to follow up his epic For Whom the Bell Tolls, published a decade earlier. The novel that emerged, Across the River and into the Trees, was a chronicle of the final days of the cantankerous American colonel Richard Cantwell, who spends his weekend leave in Venice hunting ducks, enjoying the city, and spending time with his beloved teenaged Italian contessa, Renata. This work...