The Zimmermann Telegram by Barbara Tuchman

I had always thought that America entered the first World War because of German u-boat attacks. That was only a part of the picture. Tuchman describes how the British Intelligence Service breaks the German code and how this affected a scheme to keep America out of the war. By early 1917, the war was at a stalemate. The English and French were exhausted and running out of money. Germany was ready to launch a massive u boat navy, attack all ships, neutral or otherwise, and win the war. They were afraid this might tip the scale of American public opinion towards war. The Germans hoped to keep America so busy dealing with revolts in Mexico and threats from Japan that they would avoid any entanglements in Europe. Even though I knew the outcome, this book had me on the edge of my seat as the plot unfolded. Tuchman brings the characters to life and helps the reader to follow the rather complicated unfolding of events. I loved this book.