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.

Miss Gwendolyn Brinley accepted a temporary paid companion position for the Newport summer season, believing it would be a lark to spend the summer in America's most exclusive town. She suddenly finds her summer turning anything but amusing when her employer expects her to take over responsibilities as an assistant matchmaker. Tasked with the daunting prospect of attaining advantageous matches for her clients, Gwendolyn soon finds herself in the company of Mr. Walter Townsend, the catch of the Season, but a gentleman Gwendolyn finds beyond annoying.

In 1921, Marian Arnold, the heiress to a brewing baron’s empire, seeks solace in the glass butterfly house on her family’s Wisconsin estate as Prohibition and the deaths of her parents cast a long shadow over her shrinking world. When Marian’s sanctuary is invaded by nightmarish visions, she grapples with the line between hallucinations of things to come and malevolent forces at play in the present. With dead butterflies as the killer’s ominous signature, murders unfold at a steady pace. Marian, fearful she might be next, enlists the help of her childhood friend Felix.

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.

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.

In 1774, Juliet Catesby lives with her father and sister at Royal Vale, the James River plantation founded by her Virginia family over a century before. Indigo cultivation is her foremost concern, though its export tethers her family to the powerful Buchanan clan of Glasgow, Scotland. When the heir of the Buchanan firm arrives on their shores, Juliet discovers that her father has secretly arranged for one of his daughters to marry the Scot as a means of canceling the family's debt. Confident it will be her younger, lovelier sister, Juliet is appalled when Leith Buchanan selects her instead.

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.

When their father's death leaves them impoverished, Sarah Summers and her genteel sisters fear they will be forced to sell the house and separate to earn livelihoods as governesses or companions. Determined to stay together, Sarah convinces them to open their seaside home to guests to make ends meet and provide for their ailing mother. Instead of the elderly invalids they expect to receive, however, they find themselves hosting eligible gentlemen. Sarah is soon torn between a growing attraction to a mysterious Scottish widower and duty to her family.

When newcomer Mercy Windsor arrives in Mercy Peak in 1948 after a scandal shatters her gilded world as Hollywood's beloved leading lady, she is determined to forge a new life in obscurity in this time-forgotten Colorado haven. She purchases Wildwood—an abandoned estate with a haunting history—and begins to restore it to its former glory.

Richard Brockwell, the younger son of Ivy Hill's most prominent family, hasn't been home for Christmas in years. He prefers to live in the London townhouse, far away from Brockwell Court, the old family secret that haunts him, and the shadows of his past mistakes. But then his mother threatens to stop funding his carefree life - unless he comes home for Christmas. Out of options, he sets out for Ivy Hill, planning to be back on a coach bound for London and his unencumbered bachelor life as soon as the festivities are over.

Detective James Holton has been honorably discharged from the Army Criminal Investigation Division due to wounds sustained when an IED blew up near him. Now with the Lake City Police Department, he's rooming with his good buddy and partner, Cole, while he figures out his family dynamics. Physician Assistant Lainie Jackson is eighteen months out from an attempted murder perpetrated by her ex, which ended when she managed to grab the weapon and shoot him. When he appears to have survived and is back to finish the job he started, Lainie insists it's not possible.

For Hudson, the newly titled Viscount Stildon, moving to England from India where he was born and raised was already an arduous enough endeavor. When he learns the fate of the racing empire he inherited along with his title depends upon him getting in the good graces of another stable owner, he's even more at a loss. The stable at the neighboring estate has been Miss Bianca Snowley's refuge for years, and when a strange man appears to be stealing the horses, she jumps to their protection without a second thought.

The accidents are not a matter of chance. They are deliberate. As English gentleman William Kensley becomes aware of the danger at Rosenleigh, he pleads for truth from the only man he can trust—until that man is murdered. As the secrets unfold into scandal, William’s world is tipped into destitution—leaving him penniless and alone. His only comfort is in the constant love of Isabella Gresham, but even that has been threatened.

After witnessing a wrongful conviction as a young girl, Rebecca Whitman—the first female court reporter in Montana—is now determined to defend the innocent. During a murder trial, something doesn't sit well with her about the case, but no one except the handsome new Carnegie librarian will listen to her.

As nursemaid to the eight-year-old Duke of Kielder, Robbie will spend her holidays with her young charge as a guest of Lord and Lady Jonquil. While the couple makes the child’s holiday magical, the handsome gardener works his own magic on Nurse Robbie’s heart. A Christmas house party offers two members of the ton an irresistible weekend of anonymity. But their charade comes with unexpected romantic consequences. Alice Hunt is searching for a Christmas miracle: a husband of her choosing. With the threat of an arranged marriage looming, she looks to an unlikely matchmaker for help.