Contents: • Old Faithful by Raymond Z. Gallun • Helen O'Loy by Lester del Rey • Requiem by Robert A. Heinlein • Some Curious Effects of Time Travel by L. Sprague de Camp • The Cold Equations by Tom Godwin • Plus X by Eric Frank Russell • The Big Front Yard by Clifford D. Simak • "What Do You Mean ... Human?" by John W. Campbell, Jr. • Home Is the Hangman by Roger Zelazny • Eyes of Amber by Joan D. Vinge • Ender's Game by Orson Scott Card

Contents: • Mimsy Were the Borogoves by Lewis Padgett • Mewhu's Jet by Theodore Sturgeon • The Witches of Karres by James H. Schmitz • Mikal's Songbird by Orson Scott Card • In Hiding by Wilmar H. Shiras • Weyr Search by Anne McCaffrey • Meeting of Minds by Ted Reynolds • Novice by James H. Schmitz • Child of All Ages by P. J. Plauger • Emergence by David R. Palmer