Atlantis Endgame by Andre Norton and Sherwood Smith. I was contacted to do the cover for the reprint ebook edition. It’s a science fiction novel about time travel, but the method of travel in this book is through a glowing mist, which gives it an air of fantasy. I was inspired by a scene in which the protagonists travel on a boat through the glowing mist, and represented it as a round circle, to tie the cover to the other book in the series whose cover I did, Echoes in Time, as you can see below.
