The tales of private Roman eyes, Marcus Didius Falco, and his daughter, Flavia Albia.
- The Course of Honour
- Published 1997. Set from 31 CE to 69 CE
- The Silver Pigs
- Published 1989
Shadows in Bronze- Published 1990
- Venus in Copper
- Published 1991
- The Iron Hand of Mars
- Published 1992
- Poseidon’s Gold
- Published 1993
- Last Act in Palmyra
- Published 1994
- Time to Depart
- Published 1995
- A Dying Light in Corduba
- Published 1996
- Three Hands in the Fountain
- Published 1997
- Two for the Lions
- Published 1998. Set from 73 CE to 74 CE
- One Virgin Too Many
- Published 1999
- Ode to a Banker
- Published 2000
- A Body in the Bath House
- Published 2000
- The Jupiter Myth
- Published 2001
- The Accusers
- Published 2003. Set from 75 CE to 76 CE
- Scandal Takes a Holiday
- Published 2004
- See Delphi and Die
- Published 2005
- Saturnalia
- Published 2007
- Alexandria
- Published 2009
- Nemesis
- Published 2009
- Master and God
- Published 2012. Set from 80 CE to 96 CE
- The Ides of April
- Published 2013
- Enemies at Home
- Published 2014
- The Spook Who Spoke Again
- Published 2015
- Deadly Election
- Published 2015
- The Graveyard of the Hesperides
- Published 2016
- The Third Nero
- Published 2017
- Pandora’s Boy
- Published 2018
- A Capitol Death
- Published 2019
- The Grove of the Caesars
- Published 2020
- A Comedy of Terrors
- Published 2021
- Desperate Undertaking
- Published 2022