Frances Wynn, the American-born Countess of Harleigh, enjoys more freedom as a widow than she did as a wife. After an obligatory year spent mourning her philandering husband, Reggie, she puts aside her drab black gowns, leaving the countryside and her money-grubbing in-laws behind. With her young daughter in tow, Frances rents a home in Belgravia and prepares to welcome her sister, Lily, arriving from New York - for her first London season.

Determined to find the men responsible for her disgraced father's murder, Lady Arianna Hadley disguises herself as a man and contrives to be hired as a chef in one of London's aristocratic households. But when the prince regent is poisoned by Arianna's special chocolate dessert, she finds her own quest has become intertwined with a far more deadly intrigue. The earl of Saybrook is asked by the government to investigate. When someone tries to kill them both, they become reluctant allies in the hunt to discover what evil is afoot.

London, 1861. Samantha Kingston has lived under the control of her overbearing uncle since the death of her parents six years ago. Trapped by the conventions of her gender and social class, she is desperate to find a way out. But when her aunt and uncle are murdered, the freedom she sought seems even further out of reach. A suspect in the crime, she finds herself on the run, unsure whom to trust, lost in the underworld she had only ever read about in the pages of a Dickens novel.

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.

When Sylvia Shipman's uncle plunges to his death on the eve of a catastrophic stock market crash, the verdict is suicide. But Sylvia doubts the official story after seeing a sinister stranger fleeing the scene. She doubts it even more after learning of her uncle's secret criminal connections. With the help of her family's attractive new chauffeur, the mysteriously capable Miles, Sylvia chases the true killer through the swanky jazz clubs and shadowed alleyways of 1920s New York.

Amelia Amesbury—widow, mother, and countess—has a secret. Amelia writes for a London penny paper, doling out advice on fashion, relationships, and manners under the pen name Lady Agony. But when a lady’s maid writes Amelia to ask for advice when she believes her mistress has been murdered—and then ends up a victim herself—Amelia is determined to solve the case.

Frances and George are enjoying some well-deserved leisure time in Paris when an old acquaintance from London, Alicia Stoke-Whitney, seeks Frances’s help to investigate a personal matter. Alicia’s daughter is being courted by Carlson Deaver, a wealthy American shadowed by a very suspicious tragedy. Less than a year ago, Carlson’s wife, a former actress, was murdered, her body discovered in one of the more dubious quartiers in Paris. Though authorities guess it was a robbery gone wrong, no one was ever brought to justice.

August 1920, Dublin, Ireland: A fraught task keeps Verity and her husband Sidney in the country after their initial clandestine mission has been completed: the traitor Lord Ardmore is scheming to employ the deadly phosgene gas he's stolen for some terrifying purpose, and the couple will need both the Crown forces and the rebels' help to thwart him. As they pursue their quarry, they are drawn into a case involving a series of cunning and brazen jewel thefts.

March 1833. Kiera and her husband, Sebastian Gage, have decided to settle in Edinburgh for the winter with their infant daughter. This also allows Kiera to enjoy long hours painting in her studio, making progress on the portraits she soon hopes to unveil in her own exhibit. She's thrilled when she receives an invitation to the auction of the late Lord Eldin's coveted art collection, and she and Gage eagerly accept. When the floor collapses beneath the gathering, killing one of their fellow bidders, Kiera and Gage are lucky to escape with their lives.

Frances Wynn, the American-born Countess of Harleigh, enjoys more freedom as a widow than she did as a wife. After an obligatory year spent mourning her philandering husband, Reggie, she puts aside her drab black gowns, leaving the countryside and her money-grubbing in-laws behind. With her young daughter in tow, Frances rents a home in Belgravia and prepares to welcome her sister, Lily, arriving from New York - for her first London season.

Finally finished with the renovations on her new house, bestselling children’s book author Pris and her trusty bloodhound, Bailey, are finding more opportunities to join the community, including attending the annual town festival. But their efforts are paw-sed when David Townsend, volatile grandson of the late wealthy resident Edward Townsend, comes to fetch his inheritance.

Ellie McDonnell is about to embark on her most perilous mission yet: go to Lisbon, Portugal to save her beloved cousin Toby who has reportedly escaped from a German prisoner of war camp. Toby has been missing since the Battle of Dunkirk and Ellie had all but lost hope in ever seeing him again until Major Ramsey, the British military intelligence officer she had been working closely with over the past few months, shared the news he’d intercepted.

London, 1941: Miss Jane Treen is at her desk, strong black coffee in hand and fluffy ginger cat by her side, when her top-secret government work is interrupted by an urgent call to Devon. A woman has been found dead in a lake in a place where she shouldn’t have been. Jane needs to gather the clues and find the killer before someone else from the agency gets hurt… Shy and handsome code-breaker Arthur Cilento is bewildered by the arrival of the efficient Miss Treen and her cat Marmaduke.

Hours later, the man’s cold body lies in the city mortuary, alongside the woman he couldn’t save. And his sister, unconventional nurse Gemma Tate, tracks down troubled police inspector Sebastian Bell to unravel the truth. Sebastian has enough pressure to solve the murder of an aristocratic heiress without Gemma meddling in his case. But the cryptic sentences she brings him from her brother’s notebook could be a crucial lead. If only they knew what “milky way” meant.

After deciding that life as a teacher wasn’t right for her, Priscilla found inspiration for her first children’s book in her three-year-old bloodhound’s nose for truth, and so The Adventures of Bailey the Bloodhound was born. After the book’s massively pawsitive response led Pris to move back to her hometown of Crosbyville, Indiana, to continue the series, she’s surprised by how things have changed in the town, but even more so how they haven’t.

Tudor Close Hotel, Rottingdean, is the most glamorous venue of the season. And not somewhere Viriginia or her sister Vanessa would usually choose to frequent. They're far happier at home with their writing or painting, than brushing shoulders with debutantes or starlets. When the group bumps into fashion designer Mimi Mason in the hotel bar, they begrudgingly accept an invite to her wedding breakfast the next morning. No one imagined that, a few cocktails later, Mimi would be dead.

Miss Clara Marie Stanton's family may be eccentric, but they certainly aren't insane. London, England, 1860: When Clara's ex-fiancé begins to spread rumors that her family suffers from hereditary insanity, it's all she can do to protect them from his desperate schemes, society's prejudice, and a lifetime in an asylum. Then Clara's grandfather Drosselmeyer brings on an apprentice with a mechanical leg, and all pretense of normalcy takes wing.

Lindsey is getting into her groove as the director of the Briar Creek Public Library when a New York editor visits town, creating quite a buzz. Lindsey's friend Beth wants to sell the editor her children's book, but Beth's boyfriend, a famous author, gets in the way. When they go to confront him, he's found murdered - and Beth is the prime suspect. Lindsey has to act fast - before they throw the book at the wrong person.

June 1933. Independent, young Kitty Underhay has been left in charge of her family’s hotel, The Dolphin, on the tranquil English coast. But when several rooms are broken into and searched, including Kitty’s own, she quickly realizes that something out of the ordinary is afoot at the hotel. Soon, rumors are flying in the cozy town that someone is on the hunt for a stolen ruby. A ruby that Kitty’s mother may well have possessed when she herself went missing during the Great War.

1926 – Christie is a darling of the literary circuit and the most desired guest in London’s glittering social scene. She can often be found at meetings of the Detection Club – where mystery writers come together to share ideas, swap secrets and drink copiously. But then a fellow author's initiation ceremony takes a gruesome turn, and one of the group ends up dead. Now, Agatha is no longer just the creator of great mystery plots – she’s a player in one.