Contents (view Concise Listing)

• 9 • Foreword: Alternate Possibilities • (1972) • essay by Lester del Rey
• 13 • The Sliced-Crosswise Only-On-Tuesday World • [Dayworld] • (1971) • short story by Philip José Farmer
• 31 • Good News from the Vatican • (1971) • short story by Robert Silverberg
• 41 • I'll Be Waiting for You When the Swimming Pool Is Empty • (1971) • short story by James Tiptree, Jr.
• 56 • The Power of the Sentence • (1971) • short story by David M. Locke
• 66 • The Wicked Flee • (1971) • short story by Harry Harrison
• 79 • When You Hear the Tone • (1971) • short story by Thomas N. Scortia
• 93 • Occam's Scalpel • (1971) • novelette by Theodore Sturgeon
• 118 • Hot Potato • (1971) • short story by Burt K. Filer
• 130 • The Human Operators • (1971) • novelette by Harlan Ellison and A. E. van Vogt
• 152 • Autumntime • (1971) • short story by A. Lentini
• 155 • A Little Knowledge • [Technic History] • (1971) • novelette by Poul Anderson
• 180 • To Make a New Neanderthal • (1971) • short story by W. Macfarlane [as by Wallace Macfarlane]
• 188 • The Man Underneath • (1971) • short story by R. A. Lafferty
• 202 • Ornithanthropus • (1971) • short story by B. Alan Burhoe
• 216 • Rammer • [State / Leshy Circuit] • (1971) • novelette by Larry Niven
• 246 • The Science Fiction Yearbook (1971) • (1972) • essay by Lester del Rey