The Betrayal: Belgium and Germany, 1931
The Leak: Poland, Belgium, and Germany, 1929-38
An Inspired Guess: Poland, 1932
A Terrible Mistake: Poland, 1933-39
Flight: Germany, Poland, and England, 1939-40
The First Capture: Scotland, 1940
Mission Impossible: Norway and Bletchley Park, 1940
Keeping the Enigma Secret: France and Bletchley Park, May-September 1940
Deadlock: Bletchley Park, August-October 1940
The Italian Affair: Bletchley Park and the Mediterranean, March 1941
The End of the Beginning: Norway, March 1941
Breakthrough: North of Iceland, May 1941
Operation Primrose: The Atlantic, May 1941
The Knock-Out Blow: North of Iceland, June 1941
Suspicion: Bletchley Park, the Atlantic, and Berlin, May-October 1941
A Two-Edged Sword: The Atlantic and Cape Verde Islands, September 1941
Living Dangerously: The South Atlantic and Norway, 1941-1942
The Hunt for the Bigram Tables: Bletchley Park and Norway, 1941
Black Out: The Barents Sea, Bletchley Park, and the Admiralty, 1942
Breaking the Deadlock: The Mediterranean and Bletchley Park, 1942
The Turning Point: South of France, the Mediterranean and the Atlantic, 1942-43
Trapped: South of France, 1942-43
Sinking the Scharnhorst: The Barents Sea, 1943
Operation Covered: Paris, the Indian Ocean and the Atlantic, 1943-44
The Last Hiccough: Germany, France, and the South Atlantic, 1944.
