Chain of Air Web of Ether
Colony
Tor Teen 2003
Scribner 1982
Putnam 1971
Hutchinson 1973
Arrow 1975
Neslon 1972
Dell 1974
Ballantine 1972
TSR 1987
Kingfisher 2003
TSR 1998
DelRey 1980
Taplinger 1976
Doubleday 1974
Robson Books 1977
Berkley 1977
Warner Books 1997
Kingfisher 1995
Daw 1988
Jubilee 1958 (Sydney, Australia)