[8] Introduction (Unknown Worlds: Tales from Beyond) essay by Stanley Schmidt
1 Trouble with Water (1939) short story by H. L. Gold
17 The Cloak (1939) short story by Robert Bloch
30 The Gnarly Man (1939) novelette by L. Sprague de Camp
46 The Misguided Halo (1939) short story by Henry Kuttner
59 Two Sought Adventure [Fafhrd and the Gray Mouser] (1939) novelette by Fritz Leiber (variant of The Jewels in the Forest)
85 When It Was Moonlight (1940) short story by Manly Wade Wellman
96 The Pipes of Pan (1940) short story by Lester del Rey
108 It (1940) novelette by Theodore Sturgeon
126 Fruit of Knowledge (1940) novelette by C. L. Moore
150 The Wheels of If [Park Alister] (1940) novella by L. Sprague de Camp
204 The Bleak Shore [Fafhrd and the Gray Mouser] (1940) short story by Fritz Leiber
212 They (1941) short story by Robert A. Heinlein
224 Armageddon (1941) short story by Fredric Brown
228 Mr. Jinx (1941) short story by Robert Arthur
241 A Gnome There Was (1941) novelette by Henry Kuttner and C. L. Moore [as by Henry Kuttner]
260 Hereafter, Inc. (1941) short story by Lester del Rey
271 Snulbug (1941) short story by Anthony Boucher
283 The Refugees (1942) short story by Frank Belknap Long
291 Hell Is Forever (1942) novella by Alfred Bester
353 The Hag Séleen (1942) novelette by James H. Beard and Theodore Sturgeon (variant of The Hag Sèleen) [as by Theodore Sturgeon]
367 The Witch (1943) novelette by A. E. van Vogt
385 Conscience, Ltd. (1943) short story by Jack Williamson
402 Greenface (1943) novelette by James H. Schmitz
423 Hell Hath Fury (1943) novella by Cleve Cartmill
492 Blind Alley (1943) novelette by Malcolm Jameson