Hardcastle Books in Order
Below you'll find the complete list of Hardcastle books in publication order. This is generally the recommended reading order for the series.
Reading order verified: January 2026
Publication Order
Hardcastle's Spy
Buy on Amazon2004
Hardcastle's Armistice
Buy on Amazon2005
Hardcastle's Conspiracy
Buy on Amazon2005
Hardcastle's Airmen
Buy on Amazon2006
Hardcastle's Actress
Buy on Amazon2007
Hardcastle's Burglar
Buy on Amazon2008
Hardcastle's Mandarin
Buy on Amazon2009
Hardcastle's Soldiers
Buy on Amazon2010
Hardcastle's Obsession
Buy on Amazon2011
Hardcastle's Frustration
Buy on Amazon2012
Hardcastle's Traitors
Buy on Amazon2013
Hardcastle's Quartet
Buy on Amazon2014
Hardcastle's Collector
Buy on Amazon2016
Hardcastle's Runaway
Buy on Amazon2017
Hardcastle's Quandary
Buy on Amazon2019
Hardcastle's Secret Agent
Buy on Amazon2021
Frequently Asked Questions
The recommended reading order for the Hardcastle series is publication order: 1. Hardcastle's Spy (2004), 2. Hardcastle's Armistice (2005), 3. Hardcastle's Conspiracy (2005), 4. Hardcastle's Airmen (2006), 5. Hardcastle's Actress (2007), and 11 more. This is generally the best way to experience the story as the author intended.
The Hardcastle series by Graham Ison contains 16 books. The series began in 2004 and continues to be a popular choice for readers.
The Hardcastle series is written by Graham Ison. You can find more books and series by this author on our website.
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