Contents (view Concise Listing)

• 3 • Foreword (Travelers of Space) • essay by Martin Greenberg
• 5 • Introduction: Other Life Than Ours • essay by Willy Ley
• 15 • Preface (A Dictionary of Science Fiction) • essay by Samuel A. Peeples [as by Samuel Anthony Peeples]
• 18 • A Dictionary of Science Fiction • essay by Martin Greenberg and David A. Kyle and Samuel A. Peeples
• 31 • The Interstellar Zoo • short story by David A. Kyle [as by David Kyle]
• 33 •  Life on Other Worlds • interior artwork by Edd Cartier
• 53 • The Rocketeers Have Shaggy Ears • (1950) • novella by Keith Bennett
• 93 • Christmas Tree • (1949) • short story by John Christopher [as by Christopher Youd]
• 102 • The Forgiveness of Tenchu Taen • (1938) • short story by Frederic Arnold Kummer, Jr. [as by Frederick Arnold Kummer, Jr.]
• 114 • Episode on Dhee Minor • (1939) • short story by Harry Walton
• 135 • The Shape of Things • (1948) • short story by Ray Bradbury (variant of Tomorrow's Child)
• 151 • Columbus Was a Dope • short story by Robert A. Heinlein [as by Lyle Monroe]
• 156 • Attitude • (1943) • novella by Hal Clement
• 215 • The Ionian Cycle • (1948) • novelette by William Tenn
• 241 • Trouble on Tantalus • (1941) • novelette by P. Schuyler Miller
• 265 • Placet Is a Crazy Place • (1946) • short story by Fredric Brown
• 280 • Action on Azura • (1949) • novelette by Robertson Osborne
• 317 • The Rull • [Rull] • (1948) • novelette by A. E. van Vogt
• 348 • The Double-Dyed Villains • [Wing Alak] • (1949) • novelette by Poul Anderson
• 377 • Bureau of Slick Tricks • [Bureau of Slick Tricks • 1] • (1948) • short story by H. B. Fyfe