It's 1942 and Willowjean "Will" Parker is a scrappy circus runaway whose knife-throwing skills have just saved the life of New York's best, and most unorthodox, private investigator, Lillian Pentecost. When the dapper detective summons Will a few days later, she doesn't expect to be offered a life-changing proposition: Lillian's multiple sclerosis means she can't keep up with her old case load alone, so she wants to hire Will to be her right-hand woman. In return, Will is to receive a salary, room and board, and training in Lillian's very particular art of investigation.

Three years later, Will and Lillian are on the Collins case: Abigail Collins was found bludgeoned to death with a crystal ball following a big, boozy Halloween party at her home--her body slumped in the same chair where her steel magnate husband shot himself the year before. With rumors flying that Abigail was bumped off by the vengeful spirit of her husband (who else could have gotten inside the locked room?), the family has tasked the detectives with finding answers where the police have failed.

But that's easier said than done in a case that involves messages from the dead, a seductive spiritualist, and Becca Collins--the beautiful daughter of the deceased, who Will quickly starts falling for. When Will and Becca's relationship dances beyond the professional, Will finds herself in dangerous territory, and discovers she may have become the murderer's next target.

It’s Halloween season in Mississippi as Sarah Booth and the gang gather to decorate and gush over Tinkie’s new baby, Maylin. Sarah Booth is just about to refresh the cocktails when she hears a knock on the door and opens it to find a woman named Frankie, distraught at the disappearance of her daughter Christa, a young journalist. Christa had been investigating the disappearance of young women in New Orleans over a five-year period—one every year around Halloween. Now Christa herself is missing, and Frankie fears it may be connected to a cult based in the Garden District, called People of Eternity.

People of Eternity are known to have far-reaching connections which Frankie worries may reach as high as law enforcement. Refusing to contact the authorities, she turns to Delaney Detective Agency as her only hope.

Despite initial reservations, Sarah Booth accepts the case, which takes her on a journey to a secret underworld of beguiling cult leaders, witchcraft, and potentially human sacrifice. She’ll have to keep her wits about her if she wants to crack this case...and make it home alive.

At a Hallowe’en party, Joyce—a hostile thirteen-year-old—boasts that she once witnessed a murder. When no one believes her, she storms off home. But within hours her body is found, still in the house, drowned in an apple-bobbing tub.

That night, Hercule Poirot is called in to find the “evil presence.” But first he must establish whether he is looking for a murderer or a double murderer.…

In 1977, Claire Lake, Oregon, was shaken by the Lady Killer Murders: Two men, seemingly randomly, were murdered with the same gun, with strange notes left behind. Beth Greer was the perfect suspect--a rich, eccentric twenty-three-year-old woman, seen fleeing one of the crimes. But she was acquitted, and she retreated to the isolation of her mansion.

Oregon, 2017. Shea Collins is a receptionist, but by night, she runs a true-crime website, the Book of Cold Cases--a passion fueled by the attempted abduction she escaped as a child. When she meets Beth by chance, Shea asks her for an interview. To Shea's surprise, Beth says yes.

They meet regularly at Beth's mansion, though Shea is never comfortable there. Items move when she's not looking, and she could swear she's seen a girl outside the window. The allure of learning the truth about the case from the smart, charming Beth is too much to resist, but even as they grow closer, Shea senses something isn't right. Is she making friends with a manipulative murderer, or are there other dangers lurking in the darkness of the Greer house?

For generations, every Frankenstein has found their true love and equal, unlocking lifetimes of blissful wedded adventure. Clever, pretty (and odd) Angelika Frankenstein has run out of suitors and fears she may become the exception to this family rule. When assisting in her brother Victor’s ground-breaking experiment to bring a reassembled man back to life, she realizes that having an agreeable gentleman convalescing in the guest suite might be a chance to let a man get to know the real her. For the first time, Angelika embarks upon a project that is all her own.

During the overthrow of the Mexican government, Beatriz’s father was executed and her home destroyed. When handsome Don Rodolfo Solórzano proposes, Beatriz ignores the rumors surrounding his first wife’s sudden demise, choosing instead to seize the security that his estate in the countryside provides. She will have her own home again, no matter the cost.
 
But Hacienda San Isidro is not the sanctuary she imagined.

When Rodolfo returns to work in the capital, visions and voices invade Beatriz’s sleep. The weight of invisible eyes follows her every move. Rodolfo’s sister, Juana, scoffs at Beatriz’s fears—but why does she refuse to enter the house at night? Why does the cook burn copal incense at the edge of the kitchen and mark the doorway with strange symbols? What really happened to the first Doña Solórzano?

Beatriz only knows two things for certain: Something is wrong with the hacienda. And no one there will save her.

Desperate for help, she clings to the young priest, Padre Andrés, as an ally. No ordinary priest, Andrés will have to rely on his skills as a witch to fight off the malevolent presence haunting the hacienda and protect the woman for whom he feels a powerful, forbidden attraction. But even he might not be enough to battle the darkness.

Far from a refuge, San Isidro may be Beatriz’s doom.

Daisy Darker was born with a broken heart. Now after years of avoiding each other, Daisy Darker’s entire family is assembling for Nana’s 80th birthday party in her crumbling gothic house on a tiny tidal island. The family arrives, each of them harboring secrets. When the tide comes in, they will be cut off from the rest of the world for eight hours.

But at the stroke of midnight, as a storm rages, Nana is found dead. And an hour later, the next family member follows...

Trapped on an island where someone is killing them one by one, the Darkers must reckon with their present mystery as well as their past secrets, before the tide goes out and all is revealed.