Keppler was one of the great "characters" of the industry. During the late 50's and then 60's while he was a Modern I read the magazine devotedly and they were formative in my early development as a photographer, as I'm sure it was for almost everyone who's now middle aged or slightly older.
I met him once or twice at trade shows but never had the pleasure of working with him, as by the time I started writing for magazines he'd moved on to Pop, which I never wrote for.
The industry has lost one of its best.
Michael