In 1915, Sherlock Holmes is retired and quietly engaged in the study of honeybees in Sussex when a young woman literally stumbles onto him on the Sussex Downs. Fifteen years old, gawky, egotistical, and recently orphaned, the young Mary Russell displays an intellect to impress even Sherlock Holmes. Under his reluctant tutelage, this very modern, twentieth-century woman proves a deft protégée and a fitting partner for the Victorian detective.

1926, and in a country still recovering from the Great War, London has become the focus for a delirious new nightlife. In the clubs of Soho, peers of the realm rub shoulders with starlets, foreign dignitaries with gangsters, and girls sell dances for a shilling a time. The notorious queen of this glittering world is Nellie Coker, ruthless but also ambitious to advance her six children, including the enigmatic eldest, Niven, whose character has been forged in the crucible of the Somme. But success breeds enemies, and Nellie’s empire faces threats from without and within.

The Gardener Estate is one of the most storied and beloved places on the West Coast: a magnificent house in vast formal grounds, home to a family that shaped California—and fought hard to conceal the turmoil and eccentricities within their walls. And now, just as the turmoil seems buried and the Estate prepares to move into a new future, construction work unearths a grim relic of the estate's history: a skull, hidden away some fifty years ago.

In a peaceful retirement village, four unlikely friends meet weekly in the Jigsaw Room to discuss unsolved crimes; together, they call themselves the Thursday Murder Club. When a local developer is found dead with a mysterious photograph left next to the body, the Thursday Murder Club suddenly find themselves in the middle of their first live case.

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...

As the city prepares to celebrate Queen Victoria's golden jubilee, Veronica Speedwell is marking a milestone of her own. After burying her spinster aunt, the orphaned Veronica is free to resume her world travels in pursuit of scientific inquiry - and the occasional romantic dalliance. As familiar with hunting butterflies as she is fending off admirers, Veronica wields her butterfly net and a hatpin with equal aplomb, and with her last connection to England gone, she intends to embark upon the journey of a lifetime.

Librarian Sylvia Ashe knows nothing about her past, having grown up without a father and a mother who refused to discuss him. When she stumbles upon a diary that suggests she's descended from magicians, she's skeptical. After all, magicians are special, and she's just an ordinary woman who loves books. She seeks answers from a member of the most prominent family of magicians, but she quickly learns that finding the truth won't be easy, especially when he turns out to be as artless as her, and more compelling and dangerous than books.

A reluctant ex-spy with demons of her own, Elinor finds herself facing down one of the most dangerous organized crime gangs in London, ultimately exposing corruption from Scotland Yard to the highest levels of government. The private, quiet “Miss White" as Elinor is known, lives in a village in rural Kent, England, and to her fellow villagers seems something of an enigma. Well she might, as Elinor occupies a "grace and favor" property, a rare privilege offered to faithful servants of the Crown for services to the nation.

Chief Inspector Armand Gamache of the Surêté du Québec and his team of investigators are called in to the scene of a suspicious death in a rural village south of Montreal. Jane Neal, a local fixture in the tiny hamlet of Three Pines, just north of the U.S. border, has been found dead in the woods. The locals are certain it’s a tragic hunting accident and nothing more, but Gamache smells something foul in these remote woods, and is soon certain that Jane Neal died at the hands of someone much more sinister than a careless bowhunter.

England, 1914. Joanna Blalock's keen mind and incredible insight lead her to become a highly skilled nurse, one of the few professions that allow her to use her finely tuned brain. But when she and her 10-year-old son witness a man fall to his death, apparently by suicide, they are visited by the elderly Dr. John Watson and his charming, handsome son, Dr. John Watson Jr. Impressed by her forensic skills, they invite her to become the third member of their investigative team.

Maisie Dobbs got her start as a maid in an aristocratic London household when she was thirteen. Her employer, suffragette Lady Rowan Compton, soon became her patron, taking the remarkably bright youngster under her wing. Lady Rowan’s friend, Maurice Blanche, often retained as an investigator by the European elite, recognized Maisie’s intuitive gifts. The outbreak of war changed everything. Ten years after the Armistice, in the spring of 1929, Maisie sets out on her own as a private investigator, one who has learned that coincidences are meaningful, and truth elusive.

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.

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.

Charles Lenox, Victorian gentleman and armchair explorer, likes nothing more than to relax in his private study with a cup of tea, a roaring fire and a good book. But when his lifelong friend Lady Jane asks for his help, Lenox cannot resist the chance to unravel a mystery. Prudence Smith, one of Jane's former servants, is dead of an apparent suicide. But Lenox suspects something far more sinister: murder, by a rare and deadly poison.

It is 997 CE, the end of the Dark Ages. England is facing attacks from the Welsh in the west and the Vikings in the east. Those in power bend justice according to their will, regardless of ordinary people and often in conflict with the king. Without a clear rule of law, chaos reigns. In these turbulent times, three characters find their lives intertwined.

In 1915, Sherlock Holmes is retired and quietly engaged in the study of honeybees in Sussex when a young woman literally stumbles onto him on the Sussex Downs. Fifteen years old, gawky, egotistical, and recently orphaned, the young Mary Russell displays an intellect to impress even Sherlock Holmes. Under his reluctant tutelage, this very modern, twentieth-century woman proves a deft protégée and a fitting partner for the Victorian detective.

The Gardener Estate is one of the most storied and beloved places on the West Coast: a magnificent house in vast formal grounds, home to a family that shaped California—and fought hard to conceal the turmoil and eccentricities within their walls. And now, just as the turmoil seems buried and the Estate prepares to move into a new future, construction work unearths a grim relic of the estate's history: a skull, hidden away some fifty years ago.

In 1814, Atlas Catesby, a brilliant adventurer and youngest son of a baron, is anxious to resume his world travels after a carriage accident left him injured in London. But his plans are derailed when, passing through a country village, he discovers a helpless woman being auctioned off to the highest bidder - by her husband. In order to save her, Atlas purchases the lady, Lilliana, on the spot to set her free. But Lilliana, desperate to be with her young sons and knowing the laws of England give a father all parental rights, refuses to be rescued.

His existence shattered by the Great War, Bennett Grey is investigated by an American agent who thinks he may be useful for protecting national security. U.S. Bureau of Investigation agent Harris Stuyvesant's first inclination is to let his fists do the talking. But he's well out of his jurisdiction, having traveled across the Atlantic to dig up clues on an Englishman he believes responsible for terrorist acts in the States.

As the city prepares to celebrate Queen Victoria's golden jubilee, Veronica Speedwell is marking a milestone of her own. After burying her spinster aunt, the orphaned Veronica is free to resume her world travels in pursuit of scientific inquiry - and the occasional romantic dalliance. As familiar with hunting butterflies as she is fending off admirers, Veronica wields her butterfly net and a hatpin with equal aplomb, and with her last connection to England gone, she intends to embark upon the journey of a lifetime.