I did not read the book and can only write based onthe information in this link
http://www.deutsches-museum-shop.com.../9783763761272
Sounds interesting. The whole series "Die deutsche Luftfahrt" includes many helpful books but IMHO the Rumpler-book is a bit overpriced.
Author Kranzhoff wrote a book about Fokker Dr.I years ago. I liked it but later I heard claims that he did plagiarize Imrie. I missed the necessary foot/endnotes in this earlier work.
VBR
Rammjaeger