by Isaac Asimov, Martin H. Greenberg, Charles G. Waugh, Theodore Sturgeon, Manly Wade Wellman, Henry Hasse, David Drake, Frederik Pohl, Murray Leinster, David Henry Keller, Gordon R. Dickson, Harle Oren Cummins, Damon Knight, Clark Ashton Smith
Introduction: Giants in the Earth - essay by Isaac Asimov (variant of Giants in the Earth) The Riddle of Ragnarok - short story by Theodore Sturgeon Straggler from Atlantis - novelette by Manly Wad…