Curved Space to Corsair had a target date of November 1, which we've now postponed to January.
Jemima is currently rewriting the start (where have we heard that before?) and making a few other tweaks as per the feedback from her editor.
Then it goes back to the editor for a further review. We are very happy with the diligence of our new editor!
You can get The Perihelix from Amazon, and we're working on a new paperback edition to come out with Corsair's paperback.