Early in Ann Louise Bardach's Cuban voyage she came across Cartas de Presidio or The Prison Letters of Fidel Castro. Edited by Luis Conte Aguero, who was the recipient of most of these letters, they are cited in every important work from Hugh Thomas' opus Cuba to Tad Szulc's Fidel biography, and everything in between and since. These twenty-one letters (nine to Conte Aguero, six to his late sister and close collaborator, Lidia, one to his wife...