In the summer edition of Zondervan's New Announcements catalog, Les and Leslie Parrott pen a personal message to Christian retailers selling their newest book, Trading Places.

"We can't thank you enough for the work you've done to help us help couples over the years," they write. "We wish we could visit your store personally, share a cup of coffee and say thanks face-to-face. But be assured we do not take you for granted. We know you care deeply about helping couples and we are honored that you might consider Trading Places as a tool in your efforts to do just that."

The authors end the message with a personal invitation for retailers to contact them via their Web site www.realrelationships.com "if there's anything we might do for you."

Trading Places releases this month for $19.99.