Coded documents revealing the identities of every UNACO agent have been stolen, puttling every agency life at risk. The ransom is huge but the criminal mastermind is also threatening to launch nuclear missiles if UNACO refuse to cooperate. With the clock ticking, can UNACO survive?A major crisis threatens UNACO. In a terrifying attack at Lisbon airport a world-renowned cryptologist is captured along with vital coded documents about the operations of this top-secret security organization.The UNACO team is immediately called in. Mike Graham, Sabrina Carver and C.W. Whitlock soon find themselves caught up in a desperate race to track down the files before they can be decoded.Before long, they realize they are dealing with one of the most successful and dangerous minds of the former Soviet Union - and, worse still, they are under threat at home from someone with the power to blow their cover.A pulsating story that builds to a nail-biting climax, Alistair MacLean's Code Breaker is a thriller worthy of the master himself. It is the sixth novel to be written by Alastair MacNeill from a MacLean story outline.