The year is 1958, and British spy Spencer Blake, aka "Agent K," is on an undercover mission to expose a deadly criminal organization. As he traverses the globe with his American and Soviet cohorts — from Scotland to Berlin to Las Vegas to Cuba — he furtively records his secret techniques in a manual for new recruits. Once they've primed themselves on the essentials of spy craft, keen-eyed readers will discover that Agent K has been setting them challenges and clues to decipher all along. If they are clever enough to unravel them all, a great reward awaits!