Dr David Audley & Colonel Jack Butler Books in Order

When a drained lake reveals a wartime aircraft, a dead pilot, and unusual Soviet interest, backroom researcher David Audley is pushed into the field. His investigation uncovers an old secret with sharp modern consequences.

A car bomb kills the wrong man, or perhaps exactly the right one. As Hugh Roskill investigates on Audley's behalf, a puzzle of Middle Eastern politics, assassination, and hidden agendas turns steadily darker.

At Hadrian's Wall and beyond, Audley uses colleague Jack Butler as bait in a hunt for a Soviet recruiter moving through British academic life. The result is a sly, dangerous contest built on patience, misdirection, and divided identities.

British Intelligence begins to fear that David Audley may have defected. As British and Italian operatives follow the trail, the search turns into a tense chase through old grudges, uncertain loyalties, and half-seen motives.

World War I researcher Paul Mitchell is drawn out of the library when Audley starts asking about a forgotten Somme battle. Attempts on Mitchell's life make it clear that the past is not just being studied, it is being defended with murder.

When a US Air Force plane vanishes, the missing pilot's obsession with King Arthur looks like a red herring. Audley soon learns that Arthurian scholarship, Soviet interest, and CIA worries are tangled together in one dangerous deception.

A Civil War reenactment in rural England leaves behind a very real corpse and talk of hidden Cromwell treasure. Audley follows the trail into a clever collision of seventeenth-century history and contemporary espionage.

A few weeks after D-Day, a ruthless major leads a mission behind German lines for reasons he will not explain. Young Audley and Butler are swept into the hunt, learning early just how treacherous allies can be.

Young intelligence officer Frances Fitzgibbon is asked to dig into Jack Butler's past just as his career reaches a critical moment. Her quiet inquiry opens onto murder, Irish militants, Soviet interest, and secrets Butler would rather leave buried.

During the chaos of May 1940, two young British officers find themselves stranded behind German lines after seeing something they should not have seen. Their scramble back toward safety becomes a tense wartime mystery with huge consequences.

In 1957, a British officer who is secretly working both sides wants out. Instead he is sent to draw David Audley back into intelligence, only to discover that everyone around him is playing a deeper game than he understood.

A historian is sent to research an obscure naval episode from 1812 and a KGB project called The Old Vengeful. What looks like dusty archive work becomes a dangerous hunt in which Napoleonic history starts throwing light on a modern spy operation.

A harmless-seeming advertisement by a retired general stirs up trouble in a sleepy English village. Soon Audley is dealing with terrorists, foreign intelligence services, and a conspiracy that turns local oddities into something much more dangerous.

A British intelligence officer jumps at a chance to stand in for Audley on an American assignment tied to buried Confederate gold. Instead he walks into a trap involving a dead CIA man, a KGB operator, and a rescue planned from England.

On the fortieth anniversary of D-Day, an American veteran dies in Normandy and British Intelligence starts asking hard questions. Junior operative Elizabeth Loftus uncovers links to old wartime investigations, possible Soviet penetration, and even doubts about Audley himself.

A young British agent is assigned to protect David Audley before a delicate meeting with a senior Soviet officer. Then shots are fired, rival services start maneuvering, and the real danger may be coming from Audley's own side.

In Greece and occupied Germany in 1945, Captain Fred Fattorini keeps crossing paths with a young David Audley and a secretive British unit. What begins as wartime confusion turns into a ruthless struggle over scientists, loyalty, and the first shadows of the Cold War.

When a body resurfaces near an old cottage, two journalists reopen a buried scandal from the late 1970s. Their digging leads toward David Audley, an old cover-up, and motives that reach far beyond the obvious.

Audley is pulled into a strange chain of events stretching from Germany and Italy to the Welsh border, where terrorism is rewriting the rules of late Cold War espionage. It is a fittingly tangled final case.