I like behind-the-story stories -- seeing the moment that sparks an idea, seeing an accumulation of moments that combine into new meaning … and then seeing what story evolved from the inspiration. (Hence the link to M. J. Rose’s Backstory in my blogroll.)
And from the opposite end, I like seeing how a finished story is reflected in a title and book cover. I haven’t discovered a source for titles yet, but did enjoy Barnes & Noble Studio's (caution: audio alert) short-lived video-interview series, Cover Story, and its discussion thread.
And now I’m over the moon about a blog on book covers by the graphic-design firm, Fwis. It’s admittedly focused on the visual art, but literary and publishing details do pop up in the comment threads or by following the links to designers’ websites. Go. Enjoy!