berkley publishing group berkley medallion mmpb first printing, possibly first p/b edition
cover art by richard powers (attribution in "the art of richard powers" jane frank (2001))
cover price 35¢
160pp. including titles, indicia etc, end pp. advertising
1968 second berkley medallion mmpb printing bears totally different
cover art unsigned, uncredited
cover price 60¢
160pp. including titles, indicia etc, end pp. advertising