futura publications ltd. first printing, not first uk p/b edition
cover art by paul lehr (re-used, reversed l-r from ''the moon is a harsh mistress'' robert a. heinlein (berkley medallion mmpb (1968), q.v., where it is clearly signed ''lehr'')
cover price 60p (overseas territories' prices? dig out and check)
176pp. including titles, indicia etc, end p.
the superscript ® in the title does not appear on the front cover, but is present on the title page.