Peter
Then it is unfortunate you cannot read Swedish since Lennart Andersson has produced an excellent book about the Junkers in Sweden (AB Flygindustri i Limhamn 1925-1935), but I presume you are number one subscriber for his F.13 book just published. Then you can count at least three excellent Junkers books in your library.
I also think there are more then me who eagerly awaits your own magnus opus about German aircraft 1919-1945!
Cheers
Stig