THE DARK DESIGN 1977 Putnam Uncorrected Proof	THE DARK DESIGN 1977 Putnam 1st Hardcover	THE DARK DESIGN 1978 Berkley 1st Paperback	THE DARK DESIGN 1979 Panther 1st British Paperback
THE DARK DESIGN 1980 SFBC Hardcover Reprint	THE DARK DESIGN 1982 later British Paperback	THE DARK DESIGN 1983 Berkley Reprint	THE DARK DESIGN 1987 Severn 1st British Hardcover
THE DARK DESIGN 1998 Del Rey Trade Paperback