A sharp eyed reader kindly sent me this photo from the wild. It looks like book 5 of the Eschaton Sequence has finally made an appearance in some bookstores.
John C. Wright is a practicing philosopher, a retired attorney, newspaperman, and newspaper editor, and a published author of science fiction. Once a Houyhnhnm, he was expelled from the august ranks of purely rational beings when he fell in love; but retains an honorary title.