Formats & Editions
Browse the different covers, formats, and publication history for this title.
Paperback
Mass Market Paperback
Jan 1971
Ace
ISBN 0441898513
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Mass Market Paperback
Nov 1981
Ace
ISBN 044189853X
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Mass Market Paperback
Oct 1984
Ace
ISBN 0441898548
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Paperback
Oct 1991
Ace
ISBN 044189450X
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Mass Market Paperback
Nov 2005
Baen
ISBN 1416509151
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Hardcover
Hardcover
Jul 2004
Baen
ISBN 0743488377
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eBook
eBook
Nov 2001
Baen
ISBN B00AP9CR4I
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eBook
Nov 2001
Baen Publishing Enterprises
ISBN 161824311X
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