ISBN:0-7434-7173-3, $6.99
Paperback (December 2003)

DOI:0743471733, $6.99
eBook (December 2003)

ISBN:0-671-57861-8, $6.99
Paperback (March 2000)

DOI:0671578618, $4.00
eBook (March 2000)

ISBN:0-671-57815-4, $6.99
Paperback (June 1999)

DOI:0671578154, $4.00
eBook (September 2004)

ISBN:0-671-87850-6, $5.99
Paperback (April 1998)