I've got Vol 1+2; vol 3 (on seafood charcuterie) was never translated into English. They're interesting, but not essential unless you're into traditional French charcuterie.
Some things I don't like:
The recipes all use (0.6% sodium nitrite) European curing salt, so require conversion if you're using 6.25% cure #1. No big deal if you know what you're doing.
I've found errors in some recipes - missing ingredients and the like. Don't follow the recipes blindly; read the text.
There's no coverage of dried salami or other fermented meat products, and very little on smoking.
I bought them a few years ago for about USD$89/volume (new) from the very friendly and helpful Kitchen Arts and Letters. They will ship anywhere.
http://www.kitchenartsandletters.com/