Russ Nicholson and I tried pitching a graphic novel gamebook to UK publishers in the late 1980s. Little did we know that Delacourt were doing exactly the same thing at about the same time. It probably helped that comics (bandes dessinées) are well-established in France whereas in Britain they are, as my agent says, "not even a cottage industry". La Sphère du Nécromant was by Thierry Cailleteau (writer) and Eric Larnoy (artist) and you can read more about it here. And A J Porfirio is continuing the tradition with the Graphic Novel Adventures series.
Another graphic novel gamebook that I really like is Ryan Lovelock's Kadath Express. This is something really unusual, an interactive sightseeing trip through a world of fantastical weirdness and charm. Full disclosure: Ryan sent me a free copy, but the book is such a thing of beauty that I'd have bought it anyway.
