Very hard choices
Variable Star
Very Bad Deaths
Callahan's con
By any other name
The free lunch
Callahan's Key
User Friendly
The Callahan Chronicals
Callahan's legacy
Starmind
Off the wall at Callahan's
The Callahan touch
Lady slings the booze
Starseed
Callahan's Crazy Crosstime Bar
Callahan's Lady
The New Hugo Winners, Volume I
Time Pressure
Callahan's Secret
Night of power
Melancholy elephants
Mindkiller
The Second Omni book of science fiction
Time Travelers Strictly Cash
Stardance
Callahan's Crosstime Saloon
