Sidgwick & Jackson later gathered together with The Far-Out Worlds of A. E. van Vogt (1968) into the omnibus volume Science Fiction Special 15 (1975), and with Brian N. Ball's Singularity Station (1973) and Poul Anderson's Orbit Unlimited (1961) into the omnibus volume Science Fiction Special 20 (1977).

[2] The British edition contains five short works of fiction by the author, together with an introduction by James Blish.

[1][2] The British edition was reviewed by Van Ikin in SF Commentary #47, 1976, Steve Fahnestalk (1976) in New Venture #4, Summer 1976, anonymously in Reclams Science Fiction Führer, 1982, and by Stephen E. Andrews and Nick Rennison in 100 Must-Read Science Fiction Novels, 2006.

[1] The American edition was reviewed by Howard Waldrop in Delap's F & SF Review, August 1976, Lester del Rey in Analog Science Fiction/Science Fact November 1976, and Algis Budrys in The Magazine of Fantasy & Science Fiction, December 1976.

[2] The American edition placed twelfth in the 1977 Locus Poll Award for Best Single Author Collection.