Shy, introverted Dr. Cate Kensie never imagined that she would inherit a beautiful, and oddly quirky, castle nestled in the picturesque Scottish Highlands. Truthfully, she was sure that she didn’t have any family left after her parents died in a car accident several years before, but then, she had gotten the phone call, and her entire world had turned upside down.

Lenora expected her unique ability would condemn her to a life of solitude, shunned by society. But when she receives an unexpected marriage proposal hinging on it, Lenora is shocked. All she must do in exchange for the life of a duchess is use her communicative skills to determine the reason for the former Duchess of Blackmoore’s suicide. Beyond the strange blackening on the stones of Blackmoore Castle, Lenora discovers another darkness lurks in her new Scottish Highlands home.

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.

Edinburgh, 1911: When Maud McIntyre and her lady’s maid, Daisy, form a detective agency, they never dream their first case will take place at a glamorous house in the Scottish Highlands. But when the duchess of Duddingston, concerned that a notorious jewelry thief will target her lavish weekend party, employs Maud to go undercover as a guest to find the culprit, the agency has its first case to solve....

Spring, 1918. The Great War is at a crucial stage, the Germans are making one last push into France, and the Allies are struggling to hold them back. Battle lines are shifting, and men, and their machines, are being sent up and down the front to shore up defenses. Major Heathcliff Lennox, and his batman Greggs, are told to report to their new HQ. They set off on a sunlit day to fly the distance, but the enemy is never far away, and disaster strikes. They're sent crashing to the ground behind enemy lines, where life, death, and love await.

Left with an estate on the brink of bankruptcy after their father's death, Lady Marigold Fairfax and her brother open a private investigation firm marketed to the elite . . . to spy on the elite. Dubbed The Imposters, Ltd., their anonymous group soon becomes the go-to for the crème of society when they want answers delivered surreptitiously. But the many secrets Marigold learns about her peers pale in comparison to her shock when she and her brother are hired to investigate her best friend's father as a potential traitor.

At the end of his Grand Tour, somewhere between Athens and Constantinople, Christian Selwyn, the young Earl of Hazelmere, vanished—seemingly without trace. Time passes. In London, his uncle and cousin move into his home, while his unofficial fiancée, Sophia, is left desolate and in limbo.

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.

In December 1926, Agatha Christie goes missing. Investigators find her empty car on the edge of a deep, gloomy pond, the only clues some tire tracks nearby and a fur coat left in the car - strange for a frigid night. Her World War I veteran husband and her daughter have no knowledge of her whereabouts, and England unleashes an unprecedented manhunt to find the up-and-coming mystery author. Eleven days later, she reappears, just as mysteriously as she disappeared, claiming amnesia and providing no explanations for her time away.

Lady Emily Hardcastle is an eccentric widow with a secret past. Florence Armstrong, her maid and confidante, is an expert in martial arts. The year is 1908 and they've just moved from London to the country, hoping for a quiet life. But it is not long before Lady Hardcastle is forced out of her self-imposed retirement. There's a dead body in the woods, and the police are on the wrong scent. Lady Hardcastle makes some enquiries of her own, and it seems she knows a surprising amount about crime investigation...

Being a gay man in 1827 is not only frowned upon in England, but punishable by death. Magistrate Simon Stockley would know. He’s convicted men in his courtroom and sentenced them himself. Every time, it leaves a vile taste in his mouth because Simon is no different than the men whose lives he claims.

After being kidnapped as a child, heiress Emma Grace McMurray has seen firsthand the devastation that greed causes in the world, and she wants nothing to do with it - including her father's offering her hand in a business deal. She sneaks away to be a Harvey Girl at the El Tovar Grand Canyon Hotel, planning to stay hidden even if it means always looking over her shoulder. Ray Watkins arrives at the hotel wanting to impress his father by finding success on his own. Then maybe he can take on more of the family business and do something good with the profits.

1940, England: Evelyne Redfern, known as “The Parisian Orphan” as a child, is working on the line at a munitions factory in wartime London. When Mr. Fletcher, one of her father’s old friends, spots Evelyne on a night out, Evelyne finds herself plunged into the world of Prime Minister Winston Churchill’s cabinet war rooms. However, shortly after she settles into her new role as a secretary, one of the girls at work is murdered, and Evelyne must use all of her amateur sleuthing expertise to find the killer.

Alice McNeil resolved at a young age to travel through life unencumbered by love or marriage, free to make her own decisions. A seasoned telegrapher, she's recently acquired a coveted position at an important trading firm, but when the company's ambitious junior director returns to London, things begin to change in ways Alice could never have imagined. For Douglas Shaw, years of hard work and ingenuity enabled him to escape a life of grinding poverty. He's also determined to marry into high society - a step that will ensure he never returns to the conditions of his past.

England, 1865: Newspaper columnist Lady Katherine Bascomb finds herself the subject of speculation when her latest article leads to an arrest in the murders plaguing London. The English believe women ought not to write about such vulgar things as crime, and a particularly attractive detective inspector is incensed that she's interfered with his investigation. To escape her sudden notoriety, Katherine heads to the country - only to witness a murder upon her arrival.