Another great way to promote your book is to promote yourself as an author. There are always ezines and websites looking to interview new authors. Link these pages to your Facebook page or your website to actively drive more possible readers in the direction of your book(s).
Also, take advantage of FREE press releases online to announce your new book(s) or any events, like speaking engagements, booksignings etc.
http://www.sellingbooks.com/jacqueline-mcmahon-when-love-wont-die
by Cathy B. Stucker
http://www.writersmanual.com/show.php?id=2&uid=1018
sister site to Writers Gazette and eBooksCafe
http://www.wireservice.ca/index.php?module=News&func=display&sid=3871
http://yewalus.blogspot.com/2011/02/books-that-are-out-there-romantic.html
Are you doing everything you can to promote yourself and your books?