The Rum Diary was begun in 1959 by then-twenty-two-year-old Hunter S. Thompson. It was his first novel, and he told his friend, the author William Kennedy, that The Rum Diary would "in a twisted way...do for San Juan what Ernest Hemingway's The Sun Also Rises did for Paris." In Paul Kemp, the novel's hero, there are echoes of the young Thompson, who was himself honing his wildly musical writing style as one of the "ill-tempered wandering rabble" on...