"Ace cryptographer Charlie Heller was a quiet man. A company man. But when terrorists shot his fiancee in cold blood, his life took an abrupt turn. He was not a blackmailer, but he would force the CIA's hand. He was not an assassin, but he would penetrate the Iron Curtain and enter Czechoslavakia with intent to kill. Driven by an obsessive need for revenge, targeted for elimination by the CIA itself, his chancew of success were one in a million. In a world of professional killers, he was ... (dun-dun-dun) The Amateur."
Charlie Heller works for the CIA as one their best cryptographers. During a terrorists situation, his fiance is killed. Charlie now must find out who killed her and avenger her! Great short spy thriller! Quick read. There was never a slow part of the book. One of the best revenge tales I've read. Now I want to read more of Littell's work!