Sir Rogers himmlischer Kreuzzug

Blurb

The High Crusade is a science fiction novel by Poul Anderson about the consequences of an extraterrestrial scoutship landing in Medieval England. Anderson described the novel as "one of the most popular things I've ever done, going through many book editions in several languages."
The High Crusade was originally serialized in the July–August–September 1960 issues of Astounding.
First published in book form in 1960 by Doubleday, it has been published in 1968, 1983, 1991, 2003, and most recently in 2010. It is in print with a paperback edition issued by Baen Books in 2010 with ISBN 978-1-4391-3377-4. Anderson's work was nominated for a Hugo Award in 1961, and was adapted into a 1983 wargame of the same name by TSR, Inc. and into a motion picture of the same name in 1994. Anderson wrote one sequel short story, "Quest," which originally appeared in Ares magazine in the same issue that saw the original publication of the wargame.