
Against the Fall of Night is a science fiction novel by British writer Arthur C. Clarke. Originally appearing as a novella in the November 1948 issue of the magazine Startling Stories, it was revised and expanded in 1951 and published in book form in 1953 by Gnome Press. It was later expanded and revised again and published in 1956 as The City and the Stars. A later edition includes another of Clarke's early works and is titled The Lion of Comarre and Against the Fall of Night. In 1990, with Clarke's approval, Gregory Benford wrote a sequel titled Beyond the Fall of Night, which continues the story arc of the 1953 novel. It is generally printed with the original novel as a single volume.

Ape and Essence (1948) is a novel by Aldous Huxley, published by Chatto & Windus in the UK and Harper & Brothers in the US. It is set in a dystopia, as is Brave New World, Huxley's more famous work. It is largely a satire of the rise of large-scale warfare and warmongering in the 20th century, and presents a pessimistic view of the politics of mutually assured destruction. The book makes extensive use of surreal imagery, depicting humans as apes who, as a whole, will inevitably kill themselves.

Darker Than You Think is a science fantasy novel by American writer Jack Williamson. Originally a novelette, it was expanded into novel length and published by Fantasy Press in 1948. The short version was published in Unknown in 1940. It was reprinted by UK-based Orion Books in 2003 as volume 38 of their Fantasy Masterworks series.

Dreadful Sanctuary is a science fiction novel by British author Eric Frank Russell. After its serialization in the American magazine Astounding Science Fiction in 1948, it was first published in book form in 1951 by Fantasy Press in an edition of 2,975 copies. Russell rewrote the novel for the first American paperback edition, published by Lancer Books in 1963. Editorial interference forced Russell to replace the original ending with a more tragic conclusion in this edition. A British hardcover was issued in 1953, with a paperback incorporating further "minor revisions" following in 1967. Italian translations of Dreadful Sanctuary were published in 1953 and 1986; a German translation appeared in 1971, and a French translation in 1978.

Space Cadet is a 1948 science fiction novel by Robert A. Heinlein about Matt Dodson, who joins the Space Patrol to help preserve peace in the Solar System. The story translates the standard military academy story into outer space: a boy from Iowa goes to officer school, sees action and adventure, shoulders responsibilities far beyond his experience, and becomes a man. It was published as the second of the series of Heinlein juveniles and inspired the Tom Corbett, Space Cadet media empire, including the 1950s television series and radio show which made "Space Cadet" a household phrase whose meaning later shifted in popular culture.

Walden Two is a utopian novel written by behavioral psychologist B. F. Skinner, first published in 1948. In its time, it could have been considered science fiction, since science-based methods for altering people's behavior did not yet exist. Such methods are now known as applied behavior analysis.

The World of Null-A, sometimes written The World of Ā, is a 1948 science fiction novel by Canadian American writer A. E. van Vogt. It was originally published as a three-part serial in 1945 in Astounding Stories. It incorporates concepts from the General Semantics of Alfred Korzybski. The name Ā refers to non-Aristotelian logic.