Note: All observed copies of the books in this series list the series on a page preceding the title page. The series name has changed names slightly throughout its history.
- Books published in 1974 had no name for the series.
- Books published from 1975 through mid 1977 referred to the series as "Ballantine's Classic Library of Science Fiction" or in the case of a few Del Rey printings as "our Classic Library of Science Fiction"
- Books published after November 1, 1977 refer to the series as "The Critically Acclaimed Series of Classic Science Fiction".
- Throughout the entire series the words "Classic Science Fiction" appears above the title on the cover.