In 1940, eighteen-year old Juliet Armstrong is reluctantly recruited into the world of espionage. Sent to an obscure department of MI5 tasked with monitoring the comings and goings of British Fascist sympathizers, she discovers the work to be by turns both tedious and terrifying. But after the war has ended, she presumes the events of those years have been relegated to the past forever. Ten years later, now a radio producer at the BBC, Juliet is unexpectedly...

James is recruited into CHERUB, a secret division of MI5 which consists of teenage spies. He successfully completes his training and goes on his first mission.

After a tsunami causes massive devastation to a tropical island, its governor sends in the bulldozers to knock down villages, replacing them with luxury hotels. Guarding the governor's family isn't James Adams' idea of the perfect mission-- and then retired agent Kyle Blueman comes up with an unofficial and highly dangerous plan of his own. James must choose between loyalty to CHERUB, and loyalty to his friend.

Liz Carlyle, MI5's liaison with French intelligence, investigates Birmingham's New Springfield mosque, which has disturbing ties to Pakistan and terrorism. Meanwhile, UCSO in Athens, worried that its ships are being specifically targeted by pirates, wonders if there's a leak in the organization.

Learning of a plot to attack a major peace conference in Scotland, MI5 officer Liz Carlyle follows a series of elusive clues only to realize that the threat is much greater than anticipated and has a potential to permanently destabilize the Middle East.

Still reeling from the loss of her boyfriend in a botched anti-terrorist operation, Liz Carlyle has been posted to MI5's counter-espionage desk, where she's hoping to have relative security to find her feet. However, Russia's incursions into the Crimea and President Putin's determination to silence those who oppose him, wherever they may be, quash that hope. Liz soon finds herself on the hunt for a Russian spy in Britain. And with MI5 and MI6 under...

When a Russian intelligence officer insists on speaking to no one but her about cybersabotage that's brought down a U.S. communications satellite, MI5 agent Liz Carlyle learns of a plot to hack into the West's military and reignite the Cold War.

"A Russian immigrant lies dying in a hospice in upstate Vermont. When a stranger visits, claiming to be a childhood friend, the FBI is alerted and news quickly travels to MI5 in London. Liz Carlyle and her colleague Peggy Kinsolving are already knee-deep in conspiracies, and as they unravel the events that landed the man in the hospital, Liz learns of a network of Russians and their plot to undermine the German government. Liz and Peggy set out to...

"In Europe, the Americans are pulling out their troops in a tide of isolationism. Britain, torn between loyalties to America and the continent, is caught in the middle. Across the pond, a space shuttle crashes on landing, killing all but one of the crew on board: A British citizen named Mike Dreyfuss, who will become vilified by the US press and protesters. Halfway across the world, at English ground control headquarters, Martin Hepton watches with...

"In London's MI5 headquarters a scandal is brewing that could disgrace the entire intelligence community. The Downing Street superforecaster-a specialist who advises the Prime Minister's office on how policy is likely to be received by the electorate-has disappeared without a trace. Claude Whelan, who was once head of MI5, has been tasked with tracking her down. But the trail leads him straight back to Regent's Park itself, with First Desk Diana Taverner...