List of books with polyamory, polyamorous themes, open-relationship themes, or relationship skills that apply to poly relationships. I have not read all of these books, so I don't vouch for their quality. If I do get around to reading one of these books & discover it's not really poly, I'll remove it from the list.
The books I have read are reviewed at the online Poly Book Club at www.shelfari.com/groups/12041/about
and my LiveJournal at http://joreth.livejournal.com/