To George Seto: The High Crusade is one of my favourites also. Unfortunately in 1994 it was made into a film which was an insult to a great story. I remember watching it and thinking "Oh God! what must Poul be thinking." Thankfully it has vanished from view hopefully into one of those black holes which exist. Although his books and stories are too numerous to list, some of the ones I liked include, "Brain Wave"; "Earthman, Go Home"; "Shield"; "The Corridors of Time"; The People of the Wind"; "We Have fed our Sea" and so many more. I have just checked by Astounding/Analog index and find that he has some entries.