Thanks for all your congratulations.
I kept it secret because I didn't know when it would be finally finished... it took much more time than I thought, as it is the first one.
I don't plan to write the English version because there are already many books in English about balisong, and my publisher has not yet a good distribution net in the US. Second, they trusted me because they knew me (I write articles for their mag) and because I had the argument of "it'll be the first French book on the subject". It's not easy to convince a publisher to invest on a book, mostly if there are several other ones, of good quality, on the market (I think of Imada's book).
Tonyccw, it will be a good mean to re-learn French

Anyway there are many many pix, and the graphist did a good job, it's not boring browsing it.
UnclePhilty, "Couteau" = Knife and "Papillon" = Butterfly.
"Couteau Papillon" is the classical French saying for those who don't know the word "balisong".
Bloodyknuckles, yes I have been in touch with Benchmade and they gave me pictures, support and help; no money. This is a BM42AS on the cover (the scan does not render exactly the colors as in real).
Clay, it is available now.
Guillaume