work? What advantages were they looking for? Did they succeed? This book explains how the superpowers went about gathering intelligence on each other, examines the type of information they were looking for, what they did with it, and how it enabled them to stay one step ahead of the opposition. The author explores how the intelligence organisations, both civilian and military, took advantage of rapid developments in technology, and how they adapted to the changing threat. He describes the epic scale of some of these operations, the surprising connections between them, and how they contributed to a complex multi-layered intelligence jigsaw which drove decision making at the highest level.