Serial: part 1 of 2 parts. Illustrated by van Dongen. Expanded and published in 1962 as a novel entitled [i]The Makeshift Rocket[/i] (reissued in 1969 and 1978). Published in German in 1968 as [i]Raumschiff Modell Eigenbau[/i].

Novelet. Illustrated by Turpin. Also published under the title "Memory."

Short story. Illustrated by van Dongen. Winston P. Sanders: pen-name used by Poul Anderson.

Novelette. Illustrations by Cartier. Appeared in the collected works [i]Call Me Joe[/i] (2009). Appeared in the anthologies [i]The Best Science Fiction Stories: 1949[/i], Everett F. Bleiler and T.E. Dikty, ed. (1949); [i]Giants Unleashed[/i], Groff Conklin, ed. (1965). Appeared in the omnibus [i]Science Fiction Omnibus[/i], Everett F. Bleiler and T.E. Dikty, ed. (1952).

Short sotry. Illustrations by Jack Gaughan. Part of the Psychotechnic League Series.

Novelette. Illustrated by Schoenherr. Part of the Nicholas Van Rign series. Part of the Nicholas Van Rijn series.

Novelet. Illustrator uncredited. Appeared in the collected works [i]Space Fold[/i] (1989) and [i]Admiralty[/i] (2011).

Short novel. Illustrated by Leo Summers. Winston Summers: pen-name used by Poul Anderson. Part of the Flying Mountains series. Available as a free ebook on Project Gutenberg.

Short story. Illustrated by Freas. Part of the Nicholas Van Rijn series.

Short story. Illustrated by Dick Francis.