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This article's a mix of information about three or four editions of the book. The first one is the only one that I, myself, would say was "written by Max von Stephanitz" without any reference to translators, etc.
(1) 1909 (and maybe earlier?) - publisher Pfeiffer - 342 (348?) pages - in German - title Der deutsche Schäferhund in Wort und Bild;
(2) 1923 - publisher Kampfe - 712 pages - "First American Edition revised from the original German work by J. Schwabacher";
(3) 1994 - publisher Hoflin - 740 pages (per hoflin.com, 710 per amazon.com) - ISBN9993280054 - "Reprint of the 1925 classic"; and maybe
(4?) 1925? - the "classic" that Hoflin mentions? (misprint for 1923?)
I'm really not very sure about some of this information, or how to separate it out in an article ... or how to make it verifiable given that the older editions are long out of print. But I think it's worth doing - I'll tackle it if nobody else wants to.