Avon, 1963 [unstated]. First edition. First serialized in Analog in 1962, and published in book form here. This is the second novel in the "Cities in Flight" sequence. The other novels are: They Shall Have Stars (1956); Earthman, Come Home (1955); and The Triumph of Time (1958).
"synopsis" may belong to another edition of this title.
Book Description Avon Books, 1963. Mass Market Paperback. Book Condition: New. Paul Lehr (illustrator). book. Bookseller Inventory # M0380081075