Brianna Kelly has worked at Ballymacool House and Boarding School since she was a wee girl and will likely die there. Despite a sense that she was made for something more, Brianna feels powerless to change her situation, so she consoles herself by exploring the Ballymacool grounds, looking for hidden treasures to add to the secret trove beneath the floorboards of her room.

As 1754 is drawing to a close, tensions between the French and the British on Canada’s Acadian shore are reaching a fever pitch. Seamstress Sylvie Galant and her family—French-speaking Acadians wishing to remain neutral—are caught in the middle, their land positioned between two forts flying rival flags. Amid preparations for the celebration of Noël, the talk is of unrest, coming war, and William Blackburn, the British Army Ranger raising havoc across North America’s borderlands.

As the beloved stepdaughter of the Earl of Castleton, Lady Mariah Lyons cherishes her home at Plumford Manor, but her idyllic world will be threatened when the estate passes to Cyril Lightbourne, a childhood friend she hasn’t seen or heard from in years. Once, Mariah dreamed their friendship would kindle into something more, but that was before she heard Cyril was courting the cruelhearted Lady Pearl. Now Mariah is willing to welcome him as a friend and pray he will be the heir her stepfather needs, but she’ll keep her heart locked safely away from anyone with such poor taste.

Katherine Schneider’s life as a dentist in 1913 New York is upended when a patient reveals details of a deadly plot while under the influence of laughing gas. As she is plunged into danger, she seeks help from the dashing Lieutenant Jonathan Birch, a police officer she has long admired from afar.

Patrick O'Neill survived a hardscrabble youth to become a lawyer for the downtrodden Irish immigrants in his community. He's proud of his work, even though he struggles to afford his ramshackle law office. All that changes when he accepts a case that is sure to emphasize the Blackstones' legacy of greed and corruption by resurrecting a 30-year-old mystery. Little does Patrick suspect that the Blackstones will launch their most sympathetic family member to derail him.

The year is 1901, and the hustle and bustle of the holidays is descending on New York's Fifth Avenue. For the first time in her privileged life, Adelaide Forsythe couldn’t be happier about the prospect of a quiet Christmas. That’s not to say her transition from Missto Mrs. has been without challenge. Though she doesn’t regret marrying for love instead of wealth, she feels woefully unprepared to run her own household. Then, on the first Sunday of Advent, winter winds bring surprising change, first through a young orphan boy and then a seasoned housekeeper who seems too good to be true.

After eight years in India, Oxford's most eligible bachelor, Edmund Price, has come out of the shadows to run for Parliament and is in search of an Egyptologist to value a newly acquired collection. Expecting a renowned Oxford professor, Edmund instead finds himself entangled with Ami, the professor's determined daughter. As they delve into the treasures, their connection deepens, but trouble emerges when a golden griffin—rumored to bear the curse of Amentuk—surfaces, and they're left to wonder if the curse really is at play, or if something more nefarious is hiding among the shadows . . .

Invited by a friend to trek west and help establish the newly formed town of Cheyenne, Edward Vogel is prepared to leave the haunting memories of his wife and son’s deaths behind him. The only problem is the corrupt new railroad town wants family men who can establish law and order, and desperation leads Edward to his friend Marybeth with a proposition of marriage.

Elsa Reisner's lifelong dream of working as an ornithologist at the American Museum of Natural History is fading as the job begins to drain her passion. But fate takes an unexpected turn when she is assigned to catalog the bequest of a recently deceased patron whose Gothic country mansion holds secrets and treasures waiting to be discovered.

Libby has been given a powerful gift: to live one life in 1774 colonial Williamsburg and the other in 1914 Gilded Age New York City. When she falls asleep in one life, she wakes up in the other without any time passing. She has one conscious mind but two very different lives and bodies.

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.

Haunted by the death of her sister, Finola Shanahan has resolved that she's not worthy of a family of her own and commits to spending her days caring for immigrants in the slums. Unwilling to consider marriage, Finola has perfected the ability to sabotage the relationships her parents arrange for her. At wit's end, her father calls upon the local Irish matchmaker, who pairs her with successful wagonmaker Riley Rafferty.

Newly returned from finishing school, Lady Juliette Thorndike is ready to debut in London society. Due to her years away, she hasn't spent much time with her parents, and sees them only as the flighty, dilettante couple the other nobles love. But when they disappear, she discovers she never really knew them at all. They've been living double lives as government spies-and they're only the latest in a long history of espionage that is the family's legacy.

Addie Bryant is haunted by her past of heartbreak and betrayal. After her beau, Isaac Hanson, left the Yukon, she made a vow to wait for him. When she's sold to a brothel owner after the death of her father, Addie manages to escape with the hope that she can forever hide her past and the belief that she will never have the future she's always dreamed of. Years later, Addie has found peace in her new life as a photographer, training Camera Girls to operate and sell the Brownie camera. But during the Alaska-Yukon-Pacific Expo in Seattle, Addie is reunited with Isaac.

Belgium, 1942. Young schoolteacher Andrée Geulen secretly defies the Nazis in Belgium, who are forcing Jews to wear a yellow Star of David. Andrée is not Jewish, but she feels a maternal connection to her students, who are living in constant fear, and decides to take action. No child should have to suffer under such persecution. But what can one woman do against an entire army? Ida Sterno is a Jewish woman who works with the Committee for the Defense of Jews in Belgium, a clandestine resistance group tasked with hiding children from the Gestapo. She wants to recruit Andrée.

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.

Ryder, Garrett, Kenzo, and Diesel - The Vipers. Their deals are as sordid as their business, and their reputation is enough to bring a grown man to his knees, forcing him to beg for mercy. They are not people you mess with, yet my dad did. The old man ran up a debt with them and then sold me to cover his losses. Yes, sold me. They own me now. I’m theirs in every sense of the word. But I’ve never been meek and compliant.

Beckett: If you’re reading this, well, you know the last-letter drill. You made it. I didn’t. Get off the guilt train, because I know if there was any chance you could have saved me, you would have. I need one thing from you: get out of the army and get to Telluride. My little sister Ella’s raising the twins alone. She’s too independent and won’t accept help easily, but she has lost our grandmother, our parents, and now me. It’s too much for anyone to endure. And here’s the kicker: there’s something else you don’t know that’s tearing her family apart.

When mystery author D. B. Ziegler is late delivering her book, Abi Schore steps in to help. Surely she can give her favorite author moral support over the holiday break and get the manuscript to her boss at Tea & Sympathy Publishing in time for the new year. When Abi shows up on Ms. Ziegler’s doorstep bearing holiday treats, she’s met by the author’s handsome grandson Dov, who reveals a startling plot twist. His grandmother isn’t able to finish the book and Dov promised he’d complete it so fans won’t be disappointed—a task that’s harder than he ever imagined.

It’s the flight before Christmas and Molly just got an unexpected gift: a free first-class upgrade on her plane trip home for the holidays. Bring on the complimentary cocktails! But after one too many, she spills all her secrets to the hot guy seated next to her—only to wake up mortified when her buzz has worn off. At least she never has to see Liam again ... or so she thinks. When Molly arrives at Christmas House, the festive rental home that she and her family are sharing with her sister’s fiancé and his wealthy family, she discovers that Liam is one of the new in-laws. Oops.