When Ludlow Fitch's parents cruelly betray him, he steals away to the country. He arrives in a remote village, where he meets the tall and limping figure of Joe Zabbidou - a pawnbroker with a difference. For Joe trades secrets, not goods. Employed as Joe's assistant, Ludlow records the villagers' fiendish confessions in an ancient leather-bound volume: The Black Book of Secrets. There's the gravedigger who has been resurrecting bodies; the butcher who made a mouse-meat pie; the wizened bookseller who went to murderous lengths to get her hands on a priceless tome.

Maeve Merritt chafes at the rigid rules at her London boarding school for “Upright Young Ladies.” When punishment forces her to sort through the trash, she finds a sardine tin that houses a foul-tempered djinni with no intention of submitting to a schoolgirl as his master. Soon an orphan boy from the charitable home next door, a mysterious tall man in ginger whiskers, a disgruntled school worker, and a take-no-prisoners business tycoon are in hot pursuit of Maeve and her magical discovery.

The orphaned Elsie Camden learned as a girl that there were two kinds of wizards in the world: those who pay for the power to cast spells and those, like her, born with the ability to break them. But as an unlicensed magic user, her gift is a crime. Commissioned by an underground group known as the Cowls, Elsie uses her spellbreaking to push back against the aristocrats and help the common man. Elite magic user Bacchus Kelsey is one elusive spell away from his mastership when he catches Elsie breaking an enchantment. To protect her secret, Elsie strikes a bargain.

Rhode Island, 1846. Estranged from his family, writer Merritt Fernsby is surprised when he inherits a remote estate in the Narragansett Bay. Though the property has been uninhabited for more than a century, Merritt is ready to call it home—until he realizes he has no choice. With its doors slamming shut and locking behind him, Whimbrel House is not about to let Merritt leave. Ever.

As the age of the photograph dawns in Victorian Bath, silhouette artist Agnes is struggling to keep her business afloat. Still recovering from a serious illness herself, making enough money to support her elderly mother and her orphaned nephew Cedric has never been easy, but then one of her clients is murdered shortly after sitting for Agnes, and then another, and another. Why is the killer seemingly targeting her business?

London, 1799. Dora Blake, an aspiring jewelry artist, lives with her odious uncle atop her late parents’ once-famed shop of antiquities. After a mysterious Greek vase is delivered, her uncle begins to act suspiciously, keeping the vase locked in the store’s basement, away from prying eyes—including Dora’s. Intrigued by her uncle’s peculiar behavior, Dora turns to young, ambitious antiquarian scholar Edward Lawrence who eagerly agrees to help. Edward believes the ancient vase is the key that will unlock his academic future; Dora sees it as a chance to establish her own name.

Tabby has a peculiar gift: She can communicate with the recently departed. It makes her special, but it also makes her dangerous. As an orphaned child, she fled with her sister, Alice, from their charlatan aunt Bellefonte, who wanted only to exploit Tabby's gift so she could profit from the recent craze for seances. Now a young woman and tragically separated from Alice, Tabby works with her adopted father, Eli, the kind caretaker of a large Boston cemetery.

The 1850s are a time of discovery, and London is ablaze with the latest scientific theories and debates, especially when a spectacular new exhibition of dinosaur sculptures opens at the Crystal Palace. Mary is keen to make her name in this world of science alongside her geologist husband, Henry—but despite her sharp mind and sharper tongue, without wealth and connections their options are limited.

In a daring and deadly heist, thieves have made away with an artifact of terrible power - the death mask of Louis Charbon. Made by a master craftsman, it is imbued with the spirit of a monster from history, a serial murderer who terrorized the city. Now Charbon is loose once more, killing from beyond the grave. But these murders are different from before, not simply random but the work of a deliberate mind probing for answers to a sinister question.

Dorothea Truelove is young, wealthy, and beautiful. Ruth Butterham is young, poor, and awaiting trial for murder. When Dorothea's charitable work brings her to Oakgate Prison, she is delighted by the chance to explore her fascination with phrenology and test her hypothesis that the shape of a person's skull can cast a light on their darkest crimes. But when she meets one of the prisoners, the teenaged seamstress Ruth, she is faced with another strange idea.

For the Jews of Eastern Europe, demons are everywhere: Dancing on the rooftops in the darkness of midnight, congregating in the trees, harrowing the dead, even reaching out to try and steal away the living. But the demons have a land of their own: A Far Country peopled with the souls of the transient dead, governed by demonic dukes, barons, and earls. When the Angel of Death comes strolling through the little shtetl of Tupik one night, two young people will be sent spinning off on a journey through the Far Country.

Mariyah enjoys a simple life in Vylari, a land magically sealed off from the outside world, where fear and hatred are all but unknown. There, she's a renowned wine maker, and her betrothed, Lem, is a musician of rare talent. Their destiny has never been in question. Whatever life brings, they will face it together. Then, a stranger crosses the wards into Vylari for the first time in centuries, bringing a dark prophecy that forces Lem and Mariyah down separate paths. How far will they have to go to stop a rising darkness and save their home?

After a whirlwind romance, London teashop waitress Fleur Richards can’t wait for her new husband, Hugh, to return from the Great War. But when word of his death arrives on Armistice Day, Fleur learns he has left her a sizable family fortune. Refusing to accept the inheritance, she heads to his beloved home country of Australia in search of the relatives who deserve it more.

Thea Hope longs to be an alchemist out of the shadow of her famous mother. The two of them are close to creating the legendary Philosopher’s Stone — whose properties include immortality and can turn any metal into gold — but just when the promise of the Stone’s riches is in their grasp, Thea’s mother destroys the Stone in a sudden fit of violent madness.

Dying is the only thing people do with any regularity, and Fiona makes her indecorous living cleaning up after the corpses are carted away. Her childhood best friend, Mary, was the last known victim of Jack the Ripper. It's been two years since Fiona scrubbed Mary's blood from the floorboards, and London is no longer buzzing about the Ripper, but Fiona hasn't forgotten. When she's called to a murder in the middle of the night, Fiona finds a victim mutilated in an eerily similar fashion to those of the Ripper, and only a few doors down from Mary's old home.