[Inkscape-user] Inkscape Book question

Hi,

There is a publisher who is interested in the book that I have written (http://tavmjong.free.fr/INKSCAPE/MANUAL/html/index.php) but needs to be convinced that there is a real market for the book. In the proposal I have already quoted the growth in downloads from SourceForge and the inclusion of Inkscape in most major Linux distribution.

Can people on this list think of other ways to document Inkscape's growing popularity?

I believe I am up against poor performance of previous books on Open Source drawing programs (which may account for the fact that there are over 1000 Photoshop books versus about a dozen on Gimp, all but one published four or more years ago.

Thanks,

Tav