Alistair MacLean's Code breaker.
In a lightning strike at the Lisbon airport, a world-renowned cryptologist is captured along with vital coded documents about the operations of UNACO, the top-secret security organization. Instantly, UNACO's top agents Mike Graham, Sabrina Carver and C.W. Whitlock are called into a pulse-pounding race to find the kidnappers--and a deadly madman.