first edition published in hardcover by victor gollancz, london 6/1972, as "the patterns of chaos", q.v.
first uk p/b edition by granada publishing, london 1974, ditto, in panther p/b sbn 58603918
first ace sf mmpb published 1/5/1978 (the first of the month from ace books' laid-in review copy slip)
cover art by paul alexander (signed "alexander", also credited)
cover price $1.75
288pp? including titles, indica etc., end pp. advertising.