Codex 632: The Secret of Christopher Columbus: A NovelWho was the enigma the world knows as Christopher Columbus . . . and why has his true identity been covered up for centuries? When an aged scholar is found mysteriously dead in his hotel room, Thomas Noronha, expert cryptographer and professor of history, is called upon to finish the man's unresolved investigation. In the course of unraveling the puzzles and cryptograms shrouding his late predecessor's work, Thomas discovers a code that will set him