Notes: • First edition thus (not stated). The Nelson Doubleday imprint indicates an original publication for Doubleday book clubs. • First printing has gutter code "28N" on page 213, indicates a printing date of July '72. Reprints with the code of "D43" & "E25" also appear. • Jacket painting by Brad Holland. • Reprints the 1958 ACE book World Without Men in expanded and revised form.