Our book is called:
"Bomber Units of the Luftwaffe 1935-1945 - A Reference Source" by
Henry L. deZeng IV and Douglas G. Stankey in two volumes.
It give brief histories of each unit from KGs 1 through 753, as well as LG 1 and 2, plus a number of odd units.
For a comprehensive review.description see:
http://sonic.net/~bstone/archives/080330.shtml
We have just signed the contract for our next book :
Ground Attack Units of the Luftwaffe 1935-1945 - A Reference Source" which covers all the stuka and schlacht units in two volumes.
Hopefully we will be allowed to do volumes on a number of unit types.