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 Wade Wellman
He Who Shrank - novella by Henry Hasse
From the Dark Waters - short story by David Drake
Small Lords - novelette by Frederik Pohl
The Mad Planet - novella by Murray Leinster
Dreamworld - short story by Isaac Asimov
The Thirty and One - short story by David H. Keller, M.D.
The Law-Twister Shorty - novelette by Gordon R. Dickson
In the Lower Passage - short story by Harle Oren Cummins
Cabin Boy - novelette by Damon Knight
The Colossus of Ylourgne - novelette by Clark Ashton Smith