F.H. Hinsley, E.E Thomas, C.F.G. Ransom, R.C. Knight "British Intelligence in the Second World War; " Volume 3, part 1.

This book is thorough and gives a good idea of what the British knew and didn't know. It is particularly good for giving much of the information collected. Many different sources pointed in many different directions. Therefore some intelligent analysis of the data was required. The intel effort seems to have been most effective in the U-Boat War and V-Weapons. A major effort was made in these areas.

Where the British seem to have be consistently weak was the collection and analysis of German economic data. Overall it is pretty clear that intel is an area that the British excel at.

Hardcover, 1984.

New book. Very minor shelf wear.

See also: British Intelligence in the Second World War: Its Influence on Strategy and Operations." Volume 1.