Sir Francis Walsingham, spymaster to the Tudor Queen Elizabeth has trained Kit Scarlett since she was a girl. Aware that she is able to infiltrate places that his male agents cannot, he sees her as an invaluable member of his team. When Walsingham discovers that a rebel alliance is planning to overthrow Queen Elizabeth and put Mary, Queen of Scots on the English throne, he summons Kit immediately. Together with loyal Scottish agent Iomhar Blackwood, Kit is tasked with finding out the full details of the treasonous plot.

The king's coronation brings hope. Until a murderer strikes. Spring 1661: After years of civil war followed by Oliver Cromwell's joyless rule as Lord Protector, England awaits the coronation of King Charles II. The mood in London is one of relief and hope for a better future. But when two respectable gentlemen are found in a foul lane with their throats cut, it becomes apparent that England's enemies are using the newly re-established post office for their own ends.

Spring, 1648. When Thomas Hill, a bookseller living in rural Hampshire, publishes a political pamphlet, he has little idea of the trouble that will follow. He is quickly arrested, forced on a boat to Barbados and condemned to life as a slave to two of the island’s most notoriously violent brothers. In England war has erupted again, with London under threat of attack.

When Amy Osbourne’s parents are lost at sea, she is forced to leave her London home and is sent to live with her aunt and uncle at the opposite end of the country. Alardyce House is depressing and dreary, her aunt haughty and cruel. Amy strikes up a friendship with her cousin Edward but his older brother Henry is just as conceited as his mother, and a mutual loathing develops between him and Amy. Struggling in this strange, unwelcoming environment, Amy begins to suspect that something isn’t right at Alardyce House.

1603. Former ship's surgeon Gabriel Taverner is attempting to re-establish himself as a physician in rural Devon but it's not easy to gain the locals' trust and a series of disturbing incidents convinces him that at least one person does not welcome his presence. Called out to examine a partially decomposed body found beside the river, Gabriel discovers he has a personal connection to the dead man.

London, 1654. Oliver Cromwell is at the height of his power and has declared himself Lord Protector. Yet he has many enemies at home and abroad. London is a complex web of spies and merchants, priests and soldiers, exiles and assassins. One of the web's most fearsome spiders is Damian Seeker, agent of the Lord Protector. No one knows where Seeker comes from, who his family is, or even his real name. All that is known of him for certain is that he is utterly loyal to Cromwell and that nothing can be long hidden from him.

1915, London: Working in the dusty bookshop that her Aunt Violet mysteriously inherited, Hannah Merrill is accustomed to finding twists in every tale. But discovering her beloved best friend Lily-Anne – with a paperknife through her heart – in the middle of the bookshop, is not a plotline she saw coming. The case is anything but textbook. With the discovery of a coded German message, and Hannah’s instinct that Lily-Anne’s husband is keeping secrets, she determines to get to the bottom of it. She can’t do it alone though.

May 1483: The Tower of London. When King Edward IV dies and Lady Elysabeth Scrope delivers her young godson, Edward V, into the Tower of London to prepare for his coronation, she is engulfed in political turmoil. Within months, the prince and his brother have disappeared, Richard III is declared king, and Elysabeth's sister Margaret Beaufort conspires with her son Henry Tudor to invade England and claim the throne. Desperate to protect her godson, Elysabeth battles the intrigue, betrayal and power of the last medieval court to keep Prince Edward safe.

Iris Woodmore is a journalist with a hot new story. For the first time in history, two women compete in a by-election to become the third woman elected to Parliament. Iris accompanies one of the candidates to a debate in the House of Commons. But it's a place that holds painful memories. In 1914, Iris' mother died there when she fell into the River Thames during a daring suffragette protest. In the shadow of Big Ben, a waterman tells Iris her mother didn't fall - she jumped.

April 1284. As a newly widowed lady-in-waiting to the very pregnant Queen Eleanor of England, Catrin never expected to return to Wales again. She was definitely unprepared to be confronted with murder when she got there - or to find herself face-to-face with Rhys, the childhood friend she lost 20 years before. Rhys had never intended to return home either, but a lifetime of war has deposited him right back where he started - impoverished and owing service to Catrin's older brother.

Jack the Ripper begins his reign of terror. Miss Sarah Bain, a photographer, supplements her meager income by taking illicit boudoir photographs of the town's local ladies of the night. But when two of her models are found gruesomely murdered within weeks of one another, Sarah begins to suspect it's more than mere coincidence.

The year is 1895. London is scared. A killer haunts the city's streets. The poor are hungry. Crime bosses are taking control. The police force is stretched to the breaking point. The rich turn to Sherlock Holmes, but the celebrated private detective rarely visits the densely populated streets of South London, where the crimes are sleazier and the people are poorer. In the dark corner of Southwark, victims turn to a man who despises Holmes, his wealthy clientele, and his showy forensic approach to crime: Arrowood.

Ian Rutledge returns to his career at Scotland Yard after years fighting in the First World War. Unknown to his colleagues he is still suffering from shell shock, and is burdened with the guilt of having had executed a young soldier on the battlefield for refusing to fight. A jealous colleague has learned of his secret and has managed to have Rutledge assigned to a difficult case which could spell disaster for Rutledge whatever the outcome. A retired officer has been murdered, and Rutledge goes to investigate.

It's 1811, and the threat of revolution haunts the upper classes of King George III's England. Then a beautiful young woman is found savagely murdered on the altar steps of an ancient church near Westminster Abbey. A dueling pistol found at the scene and the damning testimony of a witness both point to one man - Sebastian St. Cyr, Viscount Devlin, a brilliant young nobleman shattered by his experience in the Napoleonic Wars.

When a gruesome murder occurs in a sleepy 14th-century English town, Thomas Lester dives into an investigation that unearths witchcraft and long-kept secrets.