Paperback 1988 Year Grafton Publisher ISBN-13: 978-0-586-07213-4 ISBN-10: 0-586-07213-6 Buy on Amazon
Digital Books 2011 Year Gateway / Orion Publisher ISBN-13: 978-0-575-10345-0 ISBN-10: 0-575-10345-0 Not Available for Purchase
Paperback 1996 Year Baen Books Publisher ISBN-13: 978-0-671-87746-0 ISBN-10: 0-671-87746-1 Buy on Amazon
Digital Books 2016 Year Baen Books Publisher ISBN-13: 978-1-62579-544-1 ISBN-10: 1-62579-544-0 Not Available for Purchase