This is one of my all time favorite stories. I read it quite a few years ago, having chosen it during a meander through the biography section of the New Kensington, PA library. The NSA website has a short version of one part of his life, but the whole is much more interesting. How he became interested in codes in the first place, and what he did to bother Western Union, and how he came to work for various branches of the US government through both the first and second World Wars is a story of almost mythic proportions. This man is right up there with the other famous code breakers of the 20th Century, but he is not nearly as well known, perhaps because he didn't devise a computer in the process. It is somewhat ironic that a man who devoted his life to revealing secrets had all his papers and books secreted away by the US when he died.