Bramley Books, new ed., 1999. 90 pp., photo-ills., + some plans. D.j., 25 x 17cm. FINE. In 1938 the British Government's Code and Cypher School moved to Bletchley Park and began to lay the foundations of an organization which was to have a profound impact on the course of the impending Second World War. Bletchley's role in breaking Germany's enigma codes, as well as other German, Italian and Japanese codes, is now thought to have been of paramount importance in bringing about the ultimate Allied victory of 1945, arguably shortening the war by at least two years. The author traces the Park's early history and provides a guide to the key wartime buildings and what went on behind the scenes, as well as describing how the complex was recently saved from demolition.