Hardcastle's Spy
2004
Hardcastle's Armistice
2005
Hardcastle's Conspiracy
2005
Hardcastle's Airmen
2006
Hardcastle's Actress
2007
Hardcastle's Burglar
2008
Hardcastle's Mandarin
2009
Hardcastle's Soldiers
2010
Hardcastle's Obsession
2011
Hardcastle's Frustration
2012
Hardcastle's Traitors
2013
Hardcastle's Quartet
2014
Hardcastle's Collector
2016
Hardcastle's Runaway
2017
Hardcastle's Quandary
2019
Hardcastle's Secret Agent
2021