by Nicholas Fisk
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.
Science Fiction (Box Set) (1972)
by uncredited
Omnibus, 171 pages
A Puffin Science Fiction Galaxy (1978)
Omnibus, 141 pages
Extraterrestrial Tales (1991)
Omnibus, 387 pages
