Short story. Illustrations by Jack Binder. Eando Binder: pen-name used by Otto Binder.

Short story. Illustrations by Jack Binder. Part of the Johnny Black Series. Appeared in the collected works [i]The Best of L. Sprague de Camp[/i], published in 1978, reissued in 1986. Appeared in the anthologies [i]Modern Masterpieces of Science Fiction[/i], edited by Sam Moskowitz, published in 1965, reissued in 1974; and [i]Dorway Into Time[/i], edited by Sam Moskowitz, published in 1966, reissued in 1974.

Short story. Illustrations by H. Wesso. Part of the Dr. von Theil and Sgt. John West Series.

Serial: Part 2 of 4. Illustrations by Charles Schneeman. Part of the Lensman Universe Series.

Novelette. Illustrations by Wesso.

Short story. Illustrations by Wesso. Part of the Future History Series.

Short story. Illustrations by Charles Schneeman.

Short story. Illustrations by H. Wesso. Frederick Engelhardt: pen-name of L. Ron Hubbard.

Short story. Illustrations by R. Isip. Appeared in the collected works [i]Early del Rey[/i], published in 1975; [i]The Early del Rey: Volume 1[/i], published in 1976; [i]War and Space: Selected Short Stories of Lester Del Rey, Volume 1[/i], published in 2009. Appeared in the anthology [i]Jupiter[/i], edited by Frederik Pohl and Carol Pohl, published in 1973.

Article. Appeared in the anthology [i]Coming Attractions[/i], edited by Martin Greenberg, published in 1957.