STRANGE RELATIONS 1960 Ballantine 1st paperback	STRANGE RELATIONS 1964 Gollancz 1st British Hardcover	STRANGE RELATIONS 1966 Panther 1st British Paperback	STRANGE RELATIONS 1974 Equinox Paperback Reprint
STRANGE RELATIONS 1974 Avon PaperbackReprint	STRANGE RELATIONS 1982 Grafton Paperback Reprint	STRANGE RELATIONS 2006 Baen Books Trade Paperback Omnibus