I recieved my copy today.
content of the book:
- the projects: Dornier 29, Do 333 forrunner of the Do 30, Do 30 itself, Do31.
- the study, wind tunnel, static tests.
- the various rigs with engines
- the cockpit and aircraft systems (including diagrams)
- flight test of the rigs and aircraft
- short chapter about Do 231
lots of unknown pictures.
a translation in english would be warmly recommended.