This is a project I did with a friend - Claudio Lamas - a couple of years ago.
I did the design and illustrations of yhe entire book and Caudio wrote it. This is the second version, the first was done in portuguese, printed by Borreli. This second was printed by a German publisher - Eqip.De - and soon there will a third version also will be printed by them but, this time, in German.
Available at Amazon.De 

Luftwaffe Confidential

The main idea of the book is not only to show the Germans projects developed beteween 1939 and 1945, but relate them to the main changes in the aeronautical design and it's reflection up to now in the civil and military area among other area.

Some of the subjects of the book:

swept wing, 
swept back wings, 
growing wings, tailless,
V tail (butterfly tail), 
T tail, parasite airplanes,
vtol, flying wings,... 

An important point is that, it is not a political book. It's only about research and development.

 

Available at
Amazon.com
Amazon.de

Contents
Foreword.

Introduction.
1. Aerodynamics.
Swept back wings.
Swept forward wings
Crescent wings.
Variable sweep wings
Oblique wings
“W” wings.
Variable incidence wings 
Delta wings
Other
aerodynamic innovation
Datafiles

2. Configuration.
Tailless aircraft
Flying wings
Twin fuselage aircraft.
Assymetric aircraft
Butterfly tail
“T” tail.
Further projects in
Argentina
Ta 183 descendants
Canards
Datafiles

3. VTOL
Convertaplanes
Coleopter aircraft
Datafiles

4. Special missions
The Packplane
Parasite aircraft
Spyplanes
Rocket planes
miniature fighters
Mistel - composite aircraft
Datafiles.

Bibliography

Product Details
languages: German, English or Portuguese
Publisher: Eqip.De
pages: 168 + cover
Photos: 56
Illustrations: 64 
Printed: Full color
Size: 21x28cm 
Year: Germany, 2010