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