I think at this point if it was to be done we'd need to finalize the details...charities, submission requirements, where we'd get the art, what print site is best, how to get the word of the book out, what other extras we'd want in the book........wow this is sounding really complex...not a bad thing
so this goes along with this.. I was talking to my love to day about this.......starting a Non-profit gaming company. All profits go to charity.... I love when my mind goes off on these tangents....
The first thing you need to do is get in contact with a load of authors and see if they are happy with the idea. Then have a chat with some artists and see if you can get some donated B&W sketches.
As for a charity, how about The Red Cross? International and peaceful.