"This book celebrates the unassuming men who performed one of the greatest intelligence feats of all time. It assembles on the bright stage of history the Polish codebreakers who solved Germany's Enigma cipher machine. Using human and documentary sources in Polish, English, French, and German, Wladyslaw Kozaczuk has written what may become the definitive account of an accomplishment that, during World War Two, determined the fates of thousands."
—David Kahn, Author of The Codebreakers and Hitler's Spies