<Li> ISBN 0 - 451 - 52536 - 1 (paperback, 1999) </Li> <Li> ISBN 0 - 7641 - 0819 - 0 (paperback, 1999) </Li> <Li> ISBN 0 - 8220 - 7009 - X (e-book, 1999) </Li> <Li> ISBN 0 - 7587 - 7843 - 0 (hardcover, 2002) </Li>

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