Contents:

• Introduction by Donald A. Wollheim
• By the Waters of Babylon ["The Place of the Gods"] by Stephen Vincent Benét (1937)
• Moxon’s Master by Ambrose Bierce (1899)
• Green Thoughts by John Collier (1931)
• In the Abyss by H. G. Wells (1896)
• The Green Splotches by T. S. Stribling (1920)
• The Last Man by Wallace West (1929)
• A Martian Odyssey [Tweel] by Stanley G. Weinbaum (1934)
• Twilight [Dying Earth] by Don A. Stuart (1934)
• Microcosmic God by Theodore Sturgeon (1941)
• "—And He Built a Crooked House" by Robert A. Heinlein (1941)