Sorry, it's in German only - you probably need specific books for each
language because of the specialities of Wikipedia's in each language.
Directmedia hired the editor (Henriette Fiebig) to collect and sort
Wikipedia project pages - in the end she had to rewrite most of it
because help pages in a Wiki are different from what you expect from a
book. I think that it's the best way to to pick one or two known
community members and let them write the book (on basis of existing
project and help pages of course) or you will end in endless discussion
and unfinished parts.