cover art by ed emshwiller (signed, but most of ''emsh'' under start of the f author's name)
cover price 35¢
publishing history gives only copyright year
192pp. including titles, indicia etc, end p. advertising
date of publication presumably taken from donald h. tuck
undated (tuck: 1963) near-identical second ace books mmpb printing retains cover art, differs:
cat# F-236 (and new ace logo, new cover price)
cover price 40¢
undated (4/1970) near-identical fourth ace books mmpb printing differs:
cat# 81251
cover price 60¢
date taken from printing history in 11/1991 ace books mmpb printing
ace books undated° fifth mmpb printing is re-set (224pp. incl.), taller format mmpb and bears new
cover art (unsigned, uncredited)
cat# 81252
cover price $1.25
° - given as 10/1974 in locus #167, 20/11/1974
(?7/1980-10/81?) near-identical seventh ace books mmpb printing on same cat#, isbn differs:
(though still states: this ace printing: july 1980)
indicia printing history gives number line 4 6 8 0 9 7 5 indicating fourth printing
cover price $1.95
..( possible yet-to-be-reported printing; or:) publisher's attempt to correct errors in the 3/1984 printing instead of updating cat# to 81255 and stating fifth printing (of five-digit cat# number printings)
mis-corrected stated printing to sixth printing (of five-digit cat# number printings) and failed to advance the cat# by two to make up for two numbered 81253:
5/1987 near-identical ninth ace books mmpb printing differs:
cat# 81255
isbn 0-441-81255-4
stated seventh printing / may 1987
cover price (canada $3.50) $2.95 u.s.
11/1991 near-identical tenth ace books mmpb printing on same cat#, isbn; differs:
given as eighth printing by indicia publishing history number line
cover price (canada £?4.99?) $3.99 u.s.
publication date taken from locus