The Celebrity Cafe is now offering free cross linking in their author's directory: http://www.thecelebritycafe.com/links/Authors. If you need more links, check them out.
As you should already know, I also offer free cross linking on my BookMarket.com web site. I give any author or publisher web site a link as long as you link to my web site as well. That's what cross linking is all about.
The virtue of cross linking is that it can increase your web site page rank in Google and other search engines.
When sending page linking info to any other site, always include the following: site name, site URL, contact person, full address including phone/fax, email, and site description.