Geniuses at War: Bletchley Park, Colossus, and the Dawn of the Digital AgeThe dramatic, untold story of the brilliant team whose feats of innovation and engineering created the worlds first digital electronic computerdecrypting the Nazis toughest code, helping bring an end to WWII, and ushering in the information age. Planning the invasion of Normandy, the Allies knew that decoding the communications of the Nazi high command was imperative for its success. But standing in their way was an encryption machine they called