How a Book Cover is Designed
Novel Journey had a great post on Dog Eared Design, who creates covers for many Christian books. They did the cover for In Between, and you can see a little bit of the process toward the bottom of the article. It was cool to see their inspiration compared to the final result.
http://noveljourney.blogspot.com/2007/04/novel-journeys-interview-with-dog-eared.html