Pearl Harbor: Final Judgement reveals all of the eye-opening details of Clausen's investigation and is a damning account of massive intelligence failure. To this day, the story surrounding the Japanese attack on Pearl Harbor stokes controversy and conspiracy theories....

This groundbreaking book clearly demonstrates how the success of the American code breakers led to so many favorable military and strategic outcomes for the Allies and hastened the end of the war....

Marching Orders tells the story of how the American military's breaking of the Japanese diplomatic Purple codes during World War II led to the defeat of Nazi Germany and hastened the end of the devastating conflict. With unprecedented access to over one million pages of US Army documents and...