Which book do you use (exact name) and in which interface? The RybkaII.ctg would never choose 2...Nf6.

I am not sure though, if the variation is that bad for black, looking at the position after 10...Bxb4:



(Also, you give the result 0-1 which would be a black win?!)

Nevertheless, a normal book shouldn't use that variation regularly (even the whole french shouldn't have a big share of 1.e4 games). Take a look at the book options in your interface. Maybe theses settings are not adjusted as recommended, for that book. Or if they are, you can try to adjust them in a way that frequency has more impact and/or results less, assuming that there are wins after 1...Nf6 in the book but I cannot imagine that the move is from many games, compared to the normal 2...d5.

Edit: After a closer look, it seems to me as if 6.Ke2 (UGLY!!) is another problem, although that seems to win a knight for 2 pawns, unlike the normal Bd2. This variation looks like a computer opening from a "no book" experiment. But I could be wrong and maybe it's from high level correspondence, who knows... :-)

(It is difficult to answer if I don't know or have that book and interface to compare, but the above are my best guesses.)

Ooooh, that IS a stinker.