Robert Silverberg sold reprint rights to Downward to the Earth to Moshe Feder at Tor Books. Feder says the book was originally published in 1970, “when I was in college,” and that he hopes “we’ll be using the Polish edition’s wonderful cover painting by Tomasz Maronski.”
The book has had more than a dozen editions, and also appeared in the UK, Germany, France, and the Czech Republic.