First of all, I really hope good art is important, otherwise I'll end with no work!
Okay, now seriously, I believe that art may influence people on three different situations:
1 - If the art is crappy, it will shun people away from the book. It will look unprofessional regardless of its contents (and believe me when I say I was impressed with the contents of many "unprofessionaly looking" books). It's sad, but it's the truth when you're dealing with a larger audience.
2 - If the art is good or even excellent, it will add to the decision but it will not make someone buy a book (unless you're an art-freak like me
). Unfortunately for me and many other freelance artists out there, people don't seem to care so much about who did what and when. If it look good, it's the publisher's duty. If it's bad, it's the publisher's fault. It's very rare to see reviewers mention the art aspects of a book, even more name the artists in question. Only a few reviewers do that, like Psion for instance (and thanks for the nice words again, Alan!
)
3 - If the art is truly amazing (like the spetacular artwork Mr. Toren Macbin Atkison put in Freeport: City of Adventure) it will make people think seriously about acquiring a book, regardless of it's contents. If someone they know said that the book is cool, then that's a deal! In the specific case of Freeport, both the artwork AND the contents are AMAZING. But we all know we've been duped about cool-looking books in the past, right?
Well, that's my two cents. I think art is fundamental to the success of a publisher, even if the consumers themselves don't pay much attention to that. If it's not crappy, it's worth a look.
(I, myself, am an art-freak! I love books with cool covers and artwork. I buy stuff as inspiration and as references. But I'm not the case here...
)
Best,
Marcio Fiorito
P.S.: Doug, the cover for Necromancer's Legacy kicks some MAJOR butt. Who did it? Johneil? (And my piece for Urban Blight doesn't look bad either...
)