Available Editions

Collection

Paperback

Book cover for Callahan's Secret
2002 Year
Tor Publisher
ISBN-13: 978-0-8125-7229-2
ISBN-10: 0-8125-7229-7
Buy on Amazon

Audio

Book cover for The Callahan Chronicals
2010 Year
Playaway Digital Audio Publisher
ISBN-13: 978-1-4417-1794-8
ISBN-10: 1-4417-1794-3
Not Available for Purchase

Magazine

Traditional Print

Book cover for Analog Science Fiction/Science Fact, December 1985
1985 Year
Davis Publications Publisher
Not Available for Purchase