Week 3-Thing 7

I should probably already know this, but I would like some information from someone who knows for sure what are the implications of using book cover images. Would it be a violation of copyright to use a book cover on a poster in the library, on a website, in a newsletter? I suspect it is, but it would be good to have that confirmed.

How about getting permission from the publisher of the book? Are publishers likely to be generous with the use of book cover art or not? Do they respond in a timely manner, generally speaking? What has been your experience?