1st ed., 1994. Xxiv + 328 pp., several maps. D.j., 24 x 15cm. FINE. Many recent studies have covered aspects of the military intelligence available to Britain and her allies during the Second World War, but until now no succinct survey of the whole field has existed. By the end of 1942 Ultra had become the richest and most reliable of the many different sources, but the relation between their individual contributions requires analysis. This authoritative book provides that survey and offers an analysis. Ultra won the Battle of the Atlantic, driving the U-Boats back to coastal waters by June 1943. A lower grade code gave Montgomery the vital first news of the whereabouts of the German tanks as he planned the breakthrough at Alamein. This book investigates the reasons why only 'Bomber' Harris refused to give intelligence the credit it deserved.