"A prodigious achievement – a truly exceptional examination of perhaps the most vexing relationship in the history of U.S. foreign policy. Based on vast numbers of documents, many rarely seen before, plus firsthand interviews with nearly every one of the important participants, including Jimmy Carter and Fidel Castro, Back Channel to Cuba is the equivalent of a 9' high jump when the world record is 8'04" (held since 1993, incidentally, by a Cuban). Nothing else even comes close."