In 1925 Franz Joseph wrote a book recording his naval service, Emden: Meine Erlebnisse auf S.M Schiff Emden (Leipzig: Eckstein, 1925), translated into English and published as Emden: My Experiences in S.M.S. Emden (reprinted as Emden: The Last Cruise of the Chivalrous Raider, 1914, Brighton: Lyon, 1989, ISBN 0-904256-45-6).
Franz Joseph also had the rank of Konteradmiral in the Romanian Naval Forces [REF].