Lady Violet Belmaine emerges from two years of mourning less than enthusiastic about resuming her place in Polite Society. She’s talked into attending a country house party by her French physician friend, Hugh St. Sevier, only to find that the house party guests are preyed upon by a mysterious thief.

Gayle Windham, earl of Westhaven, is the first legitimate son and heir to the duke of Moreland. To escape his father's inexorable pressure to marry, he decides to spend the summer at his townhouse in London, where he finds himself intrigued by the secretive ways of his beautiful housekeeper. Anna Seaton is a beautiful, talented, educated woman, which is why it is so puzzling to Gayle Windham that she works as his housekeeper.

It's December 1837, and the young adults of the Cynster clan have succeeded in having the family Christmas celebration held at snowbound Casphairn Manor, Richard and Catriona Cynster's home. Led by Sebastian, Marquess of Earith, and by Lucilla, future Lady of the Vale, and her twin brother, Marcus, the upcoming generation has its own plans for the holiday season.

England, 1920. Eleanor Swift has spent the last few years travelling the world: taking tea in China, tasting alligators in Peru, escaping bandits in Persia and she has just arrived in England after a chaotic 45-day flight from South Africa. Chipstone is about the sleepiest town you could have the misfortune to meet. But then, from the edge of a quarry, through the driving rain, Eleanor is shocked to see a man shot and killed in the distance. Before she can climb down to the spot, the villain is gone and the body has vanished.

1929: Miss Clara Vale is a woman ahead of her time. Rather than attending Oxford to bag an eligible Duke (as her mother, Lady Vale, so desperately hoped), she threw herself into a degree in chemistry, with aspirations to become a scientist in her own right. But the world isn't ready for Clara. Unable to land a job in science because she's a woman, she is stuck behind the desk at a dingy London library. Until her estranged Uncle dies suddenly, leaving her his private detective agency, and laboratory, in his will.

The Earl of Wrexford possesses a brilliant scientific mind, but boredom and pride lead him to reckless behavior. He does not suffer fools gladly. So when pompous, pious Reverend Josiah Holworthy publicly condemns him for debauchery, Wrexford unsheathes his rapier-sharp wit and strikes back. As their war of words escalates, London's most popular satirical cartoonist, A. J. Quill, skewers them both.

They call him the Duke of Murder...The gossips whisper that the new Duke of Murdoch is a brute, a murderer, and even worse - a Scot. They say he should never be trusted alone with a woman. But Megan Windham sees in Hamish something different, someone different. No one was fiercer at war than Hamish MacHugh, though now the soldier faces a whole new battlefield: A London season. To make his sisters happy, he'll take on any challenge - even letting their friend Miss Windham teach him to waltz.

December 1899. After the death of her beloved grandmother, Cleopatra Fox moves into the luxury hotel owned by her estranged uncle in the hopes of putting hardship and loneliness behind her. But the poisoning of a guest on Christmas eve throws her new life, and the hotel, into chaos. Cleo quickly realizes no one can be trusted, not Scotland Yard and especially not the hotel’s charming assistant manager.

At the end of her first unsuccessful season out in society, Lady Georgiana has all but given up on attracting a suitable man - until she receives an invitation to a masked Halloween ball at Broxley Manor. Georgie is uncertain why she was invited, until she learns that the royal family intends to marry her off to a foreign prince, one reputed to be mad.

Twenty-six-year-old Beatrice Hyde-Clare is far too shy to investigate the suspicious death of a fellow guest in the Lake District. A spinster who lives on the sufferance of her relatives, she would certainly not presume to search the rooms of her host's son and his friend looking for evidence. Reared in the twin virtues of deference and docility, she would absolutely never think to question the imperious Duke of Kesgrave about anything, let alone how he chose to represent the incident to the local constable. And yet that's exactly what she does.

War hero Alistair Carsington really really loves women, and his romantic impulses have landed him in nearly as much danger as the Battle of Waterloo. To avoid his usual temptations and perhaps even repay the friend who saved his life, he's exiled himself to a place far from civilization - Derbyshire - in winter! Fate laughs at his good intentions and drives him straight into conflict with Miss Mirabel Oldridge, his match in tenacity, intelligence, and deviousness - who also happens to be wildly irresistible.

England. 1923. After a year away at finishing school where she learned etiquette, deportment, and the difference between a fish fork and a salad one, Kitty Worthington is eager to return home. But minutes after she and her brother Ned board the Golden Arrow, the unthinkable happens. A woman with a mysterious connection to her brother is poisoned, and the murderer can only be someone aboard the train. When Scotland Yard hones on Ned as the main suspect, Kitty sets out to investigate.

Life’s a struggle for Rosemary Thorn and her teen daughter, Athena. But their regular troubles are turned upside down after Granny Thorn’s mysterious death. Despite her cousin's sinister maneuverings, Rosemary returns to Myrtlewood and the sprawling, dilapidated Thorn Manor. There's more to the old house than meets the eye, as Rosemary and Athena soon find out—in a whirlwind of magic, adventure, mystical creatures, and endless cups of tea.

She's an unconventional lady who has traveled the world, practices the art of self-defense most excellently, and has an interesting tattoo in—ahem—a very unusual place. He's a former member of the Metropolitan Police, now a private investigator, who grew up on the poverty-ridden streets of Edinburgh and has worked the dangerous back alleys of London's notorious East End. A vicious murder brings them together in a race against time that takes them from the sordid back streets of London into the elite private clubs of the powerful and rich.

Fresh from teaching at her prestigious Swiss boarding school, Miss Atalanta Ashford suddenly finds herself the most eligible young lady in society when she inherits her grandfather’s substantial fortune. But with this fortune, and an elegant new Parisian home, comes a legacy passed down from grandfather to granddaughter…sleuthing discreetly for Europe’s elite. This young lady isn’t one to back down from a challenge and Miss Ashford must depend on her sharp wit and charm to solve her first case.