Jean-Marc & Randy Lofficier - The Handbook of French Fantasy & Supernatural Fiction
I found this a lot more exciting than the companion science fiction handbook, there's so much more in here that I would be interested in reading. It goes from medieval songs, poetry and Arthurian fantasy, to fairy stories by aristocrats with incredibly long names (some of them proto-feminists who had their works banned), gothic and decadent writers, folklore retellers, surrealists, occultists and a couple of eccentrics (including the autobiography of a man who claimed to have spent his whole life fighting invisible goblins), and then more modern forms of fantasy which unfortunately trended towards mimicking British and American fantasy (even to the extent of writers choosing English sounding pseudonyms and setting stories in America), which is not to say there wasn't plenty of interest in those later decades.
One of the main things that set France apart is the larger than life crime series like Paul Feval's Black Coats, Ponson du Terrail's Rocambole, Allain & Souvestre's Fantomas, Maurice Leblanc's Arsene Lupin, Jean de La Hire's Nyctalope, Arthur Bernede's Judex and Belphegor, and more. These newspaper and pulp serials unfortunately force book editors and translators to at least consider abridging them because they're so long and probably have lots of recapping (?) I'm not sure there are any especially attractive options for English readers who want the Rocambole saga.
Hard to imagine bigger publishers going for many of these right now, I just seen interviews with Jean-Marc where he complained about the French not keeping these stories alive in reprints or adaptations: "the French were never any good at commercially exploiting and developing their own works. The history of French popular literature is a graveyard of lost opportunities." (this quote from Taliesin blog interview)
There's a lot of vampire novels after Polidori and before Stoker, and it's amazing that some of the most famous writers in France (including Balzac and Dumas) written sequels to famous British and American stories. There's a defense of Pierre Benoit's Atlantida from the received wisdom (and lawsuit) that Benoit ripped off H Rider Haggard. My interest in Ponson du Terrail, Christia Sylf, Paul Feval, Maurice Magre, Serge Brussolo and many others deepened, but Lamothe-Langon and Paul Lacroix are totally new to me, I've got so many notes for further investigation.
As with the Handbook Of French Science Fiction, the index numbers are all wrong, there's a bunch of typos and I would have liked a list of everything available in english (not just from Black Coat Press but all publishers). But I strongly recommend this book, after reading the two handbooks I've got pretty strong grounding in what to look for now (not sure if I'll go for the cinema and television + radio handbooks). Rachilde was given only a short mention and Lea Silhol wasn't in there at all, so I imagine there so much more to discover, I really wish I had been better at learning languages, maybe someday.