Callahan's Crosstime Saloon
Spider Robinson
Callahan (1)
Callahan's Secret
Callahan (12)
Callahan's Lady
Callahan (4)
Lady Slings the Booze
Callahan (5)
The Callahan Touch
Callahan (6)
Callahan's Legacy
Callahan (7)
Callahan's Key
Variable Star
Robert A. Heinlein & Spider Robinson
Calahan's Con
Callahan (11)
Time Travelers Strictly Cash
Callahan's (2)