You could try the order in which they were written:
A Great Deliverance (1988)
Payment In Blood (1989)
Well-Schooled in Murder (1990)
A Suitable Vengeance (1991)
For The Sake Of Elena (1992)
Missing Joseph (1992)
Playing For The Ashes (1993)
In The Presence Of The Enemy (1996)
Deception On His Mind (1997)
In Pursuit of the Proper Sinner (1999)
A Traitor to Memory (2001)
A Place of Hiding (2003)
With No One As Witness (2005)
What Came Before He Shot Her (2006)
Careless in Red (2008)