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.

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.

Cressida Fawcett is heading to the English countryside for a weekend of cocktails and partying at her friend’s glamorous mansion, the location of a recent diamond heist. But just hours after her arrival, Cressida is woken by an almighty scream. Rushing to the landing, she looks down into the great hall to find a trembling maid standing next to the body of Harry, the friendly young chandelier cleaner. Everyone believes Harry’s death was an accident. But as Cressida examines the opulent hall and the beautiful grounds, she thinks something darker is afoot.

London, 1921: Mabel Canning is proud to be a modern woman working for the Useful Women’s Agency, carrying out tasks for gentlewomen from flower arranging to washing muddy dogs. But when she answers the door for wealthy widow Rosalind Despard, she almost chokes on her cucumber sandwich when she finds a soldier’s body on the doorstep. As she offers tea to the policemen of Scotland Yard, Mabel can’t resist getting drawn into the investigation.

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.

It’s 1924. Lady Ellen of Ashcombe Hall is on a relaxing hotel break to recuperate. Her nemesis is found dead in the restaurant, face down in his pea and ham soup. Can she confront her past to solve the mystery? Lady Ellen seeks respite in the charming seaside town of Branden Bay, whilst her home, which was used as a convalescent home for war veterans, is being refurbished to its former glory.

It’s 1924, and Blix Windway has made a career out of her wanderlust, giving lectures to ladies’ groups about everything from the flora of the American desert to the beauty of the Swiss Alps, but she needs new material for her talks. She strikes what seems to be an ideal agreement with an eccentric older lady. Blix will be her travel companion during a journey to Egypt, helping to smooth the way through customs and coordinate sightseeing tours.

Disgraced society “it” girl, Lady Caroline, has been shipped off to the French Riviera to spend remedial time with gout-impaired Uncle Albert. Her crime? An ill-advised scavenger hunt through London, with social-status-ruinous consequences.

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.

Miss Busby helped Major Heathcliff Lennox solve a series of murders at Bloxford in the Cotswolds. Now, she finds herself drawn into a new murder, but this time, it's just her, and she must rely on her sharp mind and sharper wits to catch a Cotswolds killer, along with a handsome police inspector and a reporter who's keen to make her mark.

December 1927. Mystery-writer Marius Quin has one previous bestseller, endless looming mortgage payments, and no idea how to write his next book. When his childhood friend Lady Isabella Montague invites him to an intimate New Year’s Eve party hosted by a narcissistic actor, Marius seizes upon the distraction. With his perpetually glum Basset hound along for the ride, he navigates the snowy lanes to the opulent estate of Everham Hall. As the celebrations begin, fireworks light up the sky, champagne corks pop, and then the host is murdered…

Tabitha, Lady Chesterton, the Countess of Pembroke, is newly widowed at only 22 years of age. With no son to inherit the title, it falls to a dashing, distant cousin of her husband's, Jeremy Chesterton, known as Wolf. It quickly becomes apparent that Wolf had consorted with some of London's most dangerous citizens before inheriting the title. Can he leave this world behind, or will shadowy figures from his past follow him into his new aristocratic life in Mayfair? And can Tabitha avoid being caught up in Wolf's dubious activities?

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.

If one more person gives Rosemary Lillywhite unwanted advice on when to stop mourning the loss of her beloved husband, she fears she will lose control of her sensibilities. All she wants is to be left alone to drown her misery in a glass of gin and tonic, but when Grace Barton knocks on the door of her dead husband’s investigative office, Rosemary faces a choice: come out of hiding, or turn away someone in need of help.

After months of travel, former maid Lottie Sprigg returns to Fortescue Manor in the rolling hills of Shropshire. Her arrival coincides with a celebratory dinner to mend a family feud. But the flow of champagne dwindles to a trickle when a body is found in the library. Who committed the atrocity? Suspicion falls on several characters: some above stairs and some below....

When Sasha receives a call from her old university friend Gabby inviting her to spend Christmas at Gabby’s remote Scottish lake house, Sasha knows she shouldn’t go. Twelve years ago, on Christmas Eve, when Sasha and her five closest friends were celebrating the festive season, something truly horrific happened that would change the course of their friendship forever. Something that meant Sasha hasn’t spoken to any of them since that night.

After the killing of a prominent mob lawyer, NYPD homicide detectives Jacob Jackson and Caitlin Grimes start receive chilling, written “rules” for how to commit the perfect murder. "Rule number one for the perfect murder: Evidence is your enemy. Leave none behind." Jackson (Reid Scott) and Grimes (Cobie Smulders) race to find the killer, setting them on a collision course with the city’s crime underbelly, and a perpetrator who seems happy to toy with them. “Rule number two. No crimes of passion. The perfect murder is always business, never pleasure.”

England, 1914. The world is at war. Captain Hastings, injured and shaken, is invited to Styles Court to recover. It’s a grand old country house - the family home of his old friend - and a perfect haven. Or so it seems. But in the blistering summer heat, trouble is afoot. Simmering tensions are tearing the family apart, and it all comes to a head in the most horrifying way.

Jenny sits in the same seat on the same train every week, seeing familiar faces come and go. Until a chance encounter shatters her world. Sixteen years ago, Jenny survived a traumatic ordeal that left her best friend, Susie, missing and presumed dead. The world has its theories about what happened to Susie Patterson, and one of those theories points the finger at Jenny. Now she lives a quiet life, volunteering at a crisis helpline while trying to deal with her own anxiety and the true crime fans obsessed with finding her missing friend.

Lowen Ashleigh is a struggling writer on the brink of financial ruin when she accepts the job offer of a lifetime. Jeremy Crawford, husband of best-selling author Verity Crawford, has hired Lowen to complete the remaining books in a successful series his injured wife is unable to finish. Lowen arrives at the Crawford home, ready to sort through years of Verity's notes and outlines, hoping to find enough material to get her started. What Lowen doesn't expect to uncover in the chaotic office is an unfinished autobiography Verity never intended for anyone to read.

Kidnappers grabbed Jenna in broad daylight, right in front of her children and their horrified classmates. Her family was issued an insane ransom demand: $25 million in cash and jewels, payable by the end of the school day, otherwise they’ll never see her again. As Jenna’s mother scrambles to gather the money, detectives Mo Butler and George Ortega follow the trail of the kidnappers, which will lead them through a sordid landscape of jealous lovers, broken dreamers, and twisted schemers. But every second counts, and there’s one thing Jenna Wade doesn’t have: very much time.

When Heather McKinley dreamed of becoming a doctor, she imagined curing sick kids and sporting pink stethoscopes. She never anticipated the sleepless nights, grueling exams, and endless labs. And she certainly never knew that her medical school earned the nickname Dead Med thanks to the tragic history of students overdosing on illegal drugs. But Heather would never consider doing anything like that. That is, until her longtime boyfriend dumps her, she finds herself failing anatomy, and her world starts to crumble.

Cassie thinks she has met the perfect man. Joel is sweet, handsome, romantic, and best of all, he’s crazy about Cassie. She thinks she’s found the guy she’ll spend the rest of her life with. Have children with. Grow old with. Yes, she knows about his perfect ex-girlfriend, Francesca. The beautiful, brilliant chef, beloved by all his friends. But she thinks Francesca is out of the picture. She thinks Francesca is gone for good. Think again, Cassie.

Jazz Bashara is a criminal. Well, sort of. Life on Artemis, the first and only city on the moon, is tough if you're not a rich tourist or an eccentric billionaire. So smuggling in the occasional harmless bit of contraband barely counts, right? Not when you've got debts to pay and your job as a porter barely covers the rent. Everything changes when Jazz sees the chance to commit the perfect crime, with a reward too lucrative to turn down.

Everyone thinks my husband is dead. Just like we planned. Eleven years ago, my husband disappeared. Eleven long hard years I waited, my heart breaking for our son, who didn’t know his father was coming back. Today, my hands shake as I try to understand what I’ve just learned: my husband has a new wife. This wasn’t part of our plan. Eleven years ago, my husband made a terrible mistake. I sacrificed everything to help him fix it. But now he’s put our son and me in danger again. We had a plan. He broke the rules. But who will pay the price?

Cressida Fawcett is heading to the English countryside for a weekend of cocktails and partying at her friend’s glamorous mansion, the location of a recent diamond heist. But just hours after her arrival, Cressida is woken by an almighty scream. Rushing to the landing, she looks down into the great hall to find a trembling maid standing next to the body of Harry, the friendly young chandelier cleaner. Everyone believes Harry’s death was an accident. But as Cressida examines the opulent hall and the beautiful grounds, she thinks something darker is afoot.

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.

England, 1925. After years shut away from the world, former detective Lord Edgington of Cranley Hall plans a grand ball to celebrate his seventy-fifth birthday. But when someone starts bumping off members of his scheming family, the old man enlists his teenage grandson to help find the killer, before one of them is next.

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.

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.

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.

It’s 1924, and Blix Windway has made a career out of her wanderlust, giving lectures to ladies’ groups about everything from the flora of the American desert to the beauty of the Swiss Alps, but she needs new material for her talks. She strikes what seems to be an ideal agreement with an eccentric older lady. Blix will be her travel companion during a journey to Egypt, helping to smooth the way through customs and coordinate sightseeing tours.

It’s 1924. Lady Ellen of Ashcombe Hall is on a relaxing hotel break to recuperate. Her nemesis is found dead in the restaurant, face down in his pea and ham soup. Can she confront her past to solve the mystery? Lady Ellen seeks respite in the charming seaside town of Branden Bay, whilst her home, which was used as a convalescent home for war veterans, is being refurbished to its former glory.

Penelope “Pen” Banks has a knack for puzzling things out and the uncanny ability to remember everything she sees. Two talents that have helped her make ends meet, playing cards in clubs and speakeasies. Now, they might just help her discover the true cause of death for a dear old family friend.

Olive Belgrave needs a job. Despite her aristocratic upbringing, she’s penniless. Determined to support herself, she jumps at an unconventional job—looking into the background of her cousin’s fiancé, Alfred. Alfred burst into the world of London’s high society, but his answers to questions about his past are decidedly vague. Before Olive can gather more than the basics, a murder occurs at a posh party. Suddenly, every Bright Young Person in attendance is a suspect, and Olive must race to find the culprit because a sly murderer is determined to make sure Olive’s first case is her last.

As the owner of Mrs. Claus's Treasures, Merry Wilkinson knows how to decorate homes for the holidays. That's why she thinks her float in the semi-annual Santa Claus parade is a shoe-in for best in show. But when the tractor pulling Merry's float is sabotaged, she has to face facts: there's a Scrooge in Christmas Town. Merry isn't ready to point fingers, especially with a journalist in town writing a puff piece about Rudolph's Christmas spirit. But then she stumbles upon the reporter's body on a late night dog walk....

Your lost love never came home after the war. Would you risk everything to find out what happened to him?

England, 1919. Verity Kent's grief over the loss of her husband pierces anew when she receives a cryptic letter suggesting her beloved Sidney may have committed treason before his untimely death. Determined to dull her pain with revelry, Verity's first impulse is to dismiss the derogatory claim. But the mystery sender knows too much - including the fact that during the war Verity worked for the Secret Service, something not even Sidney knew.

Paris 1925: When news reporter Abigail Dixon trades the Chicago newsroom for the Paris fashion scene, she finds herself dazzled by the latest looks from Coco Chanel, sipping champagne at the Ritz, and interviewing a famous designer. Stepping into his luxurious atelier on Rue du Faubourg Saint-Honoré, Abigail is ready to swoon over the exquisite gowns. The last thing she expects to find is her estranged stepmother lying dead on the fitting room floor–and Abigail framed as the prime suspect.

Martin Friedrich, a German philosopher, is cycling through an intersection on his way to give a lecture when a speeding car strikes and kills him. Shortly afterwards, Detective Sergeant Stephen Minter - an Austrian-born cockney Jew, whose parents were interned during the war as enemy aliens - stands over the body of Friedrich, contemplating the age-old question: who did it?