I was fairly pleased with the Devil's Bargain giant red Spock cover. It was a good decision to go with a somewhat devilish looking Spock since they decided not to spoil one of the story's twists in the cover copy or on the cover. I don't know if it's a huge surprise what the twist turns out to be, but that's the way they wanted to go. I believe the artist was working off the original flap copy, which was not accurate for the final book. There is no mining colony other than Janus VI in the book (and since I mention Janus VI, you can probably guess what the hidden twist might be). The (non Federation) colony where a great deal of the book takes place is an agricultural and bio products affair in the story. It had to be non Federation for the *real* twist to work, btw. :-) But, all that said, I really like the cover.
I really like the cover as well, and I'm a big fan of those particular Janus VI-related lifeforms. Excited to check this one out when it's released.
And welcome to the forums, it's always great to have authors to talk to! Don't let us scare you off, okay?