by Eric Frank Russell
In addition to its stand-alone volume, this title was published in the follow books. It can be rated independently of any volumes containing it.
Sentinels from Space / The Ultimate Invader and Other Science-Fiction: Stories from the F… (1954)
by Donald A. Wollheim, Eric Frank Russell
Omnibus, 179 pages
Entities: The Selected Novels of Eric Frank Russell (2001)
Omnibus, 691 pages
