I’d never heard of this site before, but I was pointed in this direction on Facebook, and found that the Luna Anthology–in which there is a story from the Carter Files universe: “Much Madness Is Divinest Sense”–is up for Cover of the Month.
Apparently, it doesn’t take much more than a Facebook account to vote (that’s how I did it). So, if you like, follow the above link and vote for your favorite cover (Luna or otherwise). Round one of the contest is open until June 7.
If you haven’t read this short story collection, I definitely recommend it, and not just because one of my stories is in there. It’s available on Amazon.