Novelette. Illustrations by Swenson. Part of the Clane Series. Appeared in the collected works [i]Transgalactic[/i] (2006). Was part of the nove [i]Empire of the Atom[/i] (1957).

Novelette. Illustrations by Paul Orban. Part of the Space Beagle Series Appeared in the collected works [i]M 33 in Andromeda[/i], published in 1971; and [i]Transfinite: The Essential A.E. van Vogt[/i], published in 2003. Appeared in the anthology [i]Rainbow Fantasia: 35 Spectrumatic Tales of Wonder[/i], edited by Forrest J. Ackerman, published in 2001.

Short story. Illustrations by Swenson.

Novelette. Illustrations by Swenson. Part of the Clane Series One of 5 stories used to make the novel [i]Empire of the Atom[/i] (1957). Appeared in the collected works [i]The Best of A.E. van Vogt[/i] (1974) and [i]Transgalactic[/i] (2006).

Short story. Illustrations by A. Williams. Also known as Heir Unapparent.

Short story. Illustration by Jack Binder. Appeared in the collected works [i]The Far-Out Worlds of A.E. van Vogt[/i] (1968); [i]The Worlds of A.E. van Vogt[/i] (1974). Appeared in the Omnibus [i]Science Fiction Special 15[/i] (1975).

Novelette. Illustrated by F. Kramer. Part of the Rull Series Appeared in the collected works [i]The Proxy Intelligence and Other Mind Benders[/i], published in 1971 and [i]The Gryb[/i], published in 1976 and reprinted in 1978 and 1980 under the title [i]The Gryb[/i]. Appeared in the anthology [i]Beachheads in Space[/i], published in 1952 and reprinted in 1957 and 1964.

Serial: part 3 of 4. Illustrations by Schneeman.

Serial: part 1 of 4 parts. Illustrations by Schneeman. Published as a novel in 1946 under the same title.

Serial: part 2 of 4 parts. Illustrations by Schneeman.