Author · 30 titles
30 titles
Very hard choicesBook· 2008
Variable StarBook· 2006
Very Bad DeathsBook· 2004
Callahan's conBook· 2003
The free lunchBook· 2001
Callahan's KeyBook· 2000
Callahan's legacyBook· 1996
StarmindBook· 1995
The Callahan touchBook· 1993