#1. Jack of Spies [2013] 11 hours 44 mins. Read by Clive Mantle.
Jack McColl is a globe-trotting salesman for a luxury car firm.

He is also a part-time spy for the fledgling Secret Service on the eve of the First World War, doing London's bidding wherever internal or external enemies threaten the security of the British Empire. As 1913 ends he is in China, checking out the German naval base at Tsingtao between automobile demonstrations in Peking and Shanghai. Caitlin Hanley is a young Irish-American journalist with the sort of views that most British men would find dangerously advanced. McColl is no exception, but once captivated he finds himself unwilling to give her up - even when Caitlin's radical politics and family connections threaten to compromise his undeclared career as a spy. Then the pair become involved in a plot that threatens the Empire in its hour of greatest need...

#2. One Man's Flag [2015] 12 hours 39 mins. Read by Robert Ian Mackenzie.
The follow-up to Jack of Spies.. Jack McColl, a Scottish car salesman who moonlights as a spy for His Majesty's Navy, takes listeners on an epic adventure across the world on the eve of World War One.
India, 1915. Jack McColl is on a reconnaissance mission to better defend the British Empire against Bengali terrorists and their German allies. In England, meanwhile, Jack's former lover, Caitlin Hanley, witnesses the execution of her brother for a treasonous plot that Jack helped foil. His execution has only intensified Caitlin's involvement in the cause of Home Rule. An uprising in Dublin will bring Caitlin and Jack back together as lovers - and enemies.

#3. Lenin's Roller Coaster [2017] 11 hours 49 mins. Read by Robert Ian Mackenzie.
Winter 1917: As a generation of Europe's young men perish on the Eastern and Western fronts, British spy Jack McColl is assigned a sabotage mission deep in Central Asia, where German influence is strong. As he quickly realizes, the mission only becomes more dangerous the closer he gets to its heart. Meanwhile, the woman he loves, Irish-American suffragette journalist Caitlin Hanley, is in Bolshevik Russia, thrilled to have the chance to cover the Revolution. Caitlin knows Moscow is where she is meant to be during this historic event - even if she is putting her own life at risk to bear witness. But four years of bloody war have taken their toll on all of Europe, and Jack and Caitlin's relationship may become another casualty. Caitlin's political convictions have always been for progress, feminism, and socialism - often diametrically opposed to the conservative goals of the British Empire Jack serves. Up until now Jack and Caitlin have managed to set aside their allegiances and stay faithful to each other, but the stakes of their affair have risen too high. Can a revolutionary love a spy? And if she does, will it cost one of them their lives?

#4. The Dark Clouds Shining [2018] 15 hours 17 mins. Read by John Curless.
London, 1921: Ex-Secret Service spy Jack McColl is in prison serving time for assaulting a cop. McColl has been embittered by the Great War. He can't stomach spying for the British Empire anymore. He's also heartbroken. The love of his life, radical journalist Caitlin Hanley, parted ways with him three years earlier so she could offer her services to the Communist revolution in Moscow. Then his former Secret Service boss offers McColl the chance to escape his jail sentence if he takes a dangerous and unofficial assignment in Russia, where McColl is already a wanted man...