In 1991, Paco Taibo II wrote The Shadow of a Shadow , a book about four men who meet to play dominos in a hotel bar in Mexico City. The time is 1922, and the men are a motley group-a poet who makes a living writing advertisements for patent medicine, a radical Chinese-Mexican union organizer, a lawyer who represents prostitutes, and a newspaper crime reporter who churns out pages of copy "like links of sausage in a chorizo factory." As the story builds,...