I think this is about as final a cover as it's going to get, and Tor were good enough to send me initial sketches and drawings of the concept for this cover and ask my opinion. This is the kind of thing that can cause some authors to gnash and grind their teeth with envy, since it's more common in the world of publishing for an author to be entirely ignored when it comes to the cover art they're going to get. Mostly I've been just fine with the art Tor have given me. There was one initial design for Against Gravity that had me nearly running screaming in the streets, but Tor were kind enough to listen to my gibbering pleas for mercy and your eyeballs were saved from a terrible fate as a result. At the same time, of course, I don't want to be too pernickety.
As yet, I have absolutely no idea what the release date for this is, bar that it's sometime next year. At a guess, I'd say about July. What you see below here is the full wraparound cover for the hardback. If you want to see them in more detail, click on each image and it should open up much larger than you see it here.