When faced with an unwanted marriage, Alice Rosemeyer accepts an invitation to the estate of Larkhall. Determined to earn her future security without a husband, she begins operating as the anonymous Ace of Hearts, writing letters and offering advice on behalf of the men eager to secure a match at the close of the London season. If she can manage to keep her identity secret, her reputation intact, and avoid the arrogant house guest, Mr. Thomas Herring, she might just call herself successful.

Much to her father's dismay, Miss Amelia Buxton aspires to become a spinster, just like her eccentric aunt. Growing up with parents who married for every reason but love, she has never seen a joyful marriage. When Amelia requests a summer trip to the legendary waters of Brighton, her father allows her the excursion, but with one requirement: She must return engaged, or agree to the proposal of the man of his choosing.  

After losing her fiancé to a terrible accident, Miss Katherine Blackmore found contentment as a matchmaker to the members of Society. Working alongside her sisters, they strive to secure the most unlikely people with love matches. Everything is perfect until an infuriating lord steps into her office, turning her world upside down. Edward Simpson, the Marquess of Berkshire, has a problem. His sister needs to marry, and quickly. When he approaches Miss Blackmore to hire her services, he does so poorly and ends up soundly insulting her. Luckily, he fares better with his second attempt.

Hidden away in rural Devonshire, Phyllida Satterthwaite has always been considered more odd than beautiful. But in London, her oddity has made her a sensation. Far worse, it’s caught the eye of the sinister Duke of Moreland - a notorious art collector obsessed with acquiring one-of-a-kind treasures. To escape the duke’s clutches, she’s going to need a little help. Captain Arthur Heywood’s days of heroism are long past. Grievously injured in the Peninsular War, he can no longer walk unaided, let alone shoot a pistol. What use can he possibly be to a damsel in distress?

Living in London's poorest slum, Mercy Wilkins has little hope of a better life. When she's offered an opportunity to join a bride ship sailing to British Columbia, she agrees. After witnessing so much painful heartache and loss in the slums, the bride ship is her only prospect to escape a bleak future, not only for herself but, she hopes, someday for her sister. Wealthy and titled Joseph Colville leaves home and takes to the sea - as ship's surgeon - in order to escape the pain of losing his family. When Mercy becomes his assistant, the two must fight against a forbidden love. 

As a child, Devlin Ware thought his family stood for all that was right and good in the world. They were kind, gracious, and shared the beauty of Ravenwood, their grand country estate, by hosting lavish parties for the entire countryside. But at 22, he discovered his whole world was an elaborate illusion, and when Devlin publicly called his family to account for it, he was exiled as a traitor. So be it. He enlisted in the fight against Napoleon and didn't look back for six years. But now his father is dead, the Ware family is broken, and as the heir he is being called home.

Lady Charlotte Darrington’s path in life is clearly laid out before her: she will select a suitable husband, marry, and one day inherit her father’s Scottish dukedom. But a growing restlessness has her desperate for a bit of freedom before her all-too-certain future closes in. When the opportunity to travel to America arises, Charlotte leaps at the chance and soon finds herself across the Atlantic in Pittsburgh, Pennsylvania. Her American hosts and their friends couldn’t be more welcoming—all except one. The insufferable Dr. Galloway captures her eye—and her ire.

Miss Amelia Fleming has a very good reason to hate the Earl of Langley. A year ago, her father drowned in the Thames after losing a fortune to Langley at cards. Now her family is broke, her fiance has broken their engagement, and the debt still hasn't been paid. Someone has to deal with the earl, but Amelia's brother doesn't have the nerve and her mother has fled to France. It's no business for a gently bred young lady, but the Earl of Langley is about to learn that Amelia Fleming is not your typical young lady . . .

When Felicity Thurston is caught alone with a man at a ball, she must marry him to avoid a ruined reputation. But what she doesn't know is that he's the brother of the man she loves.  

Georgiana Paige is on the shelf after eight full Seasons in London and not a single offer of marriage. When the opportunity to act as companion to her spinster aunt presents itself, she jumps at the chance to escape the Marriage Mart and embark on a new adventure. Upon her eventful arrival in the tiny Yorkshire village, though, she finds herself confronted with a man who both piques her interest and provokes her pride.

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.

Despite the fact that her daughter is not cooperating, Caroline, Duchess of Riverton, is determined to ensure every one of her children marries someone they love as much as she loved their late father. William, the widowered Earl of Blackstone, is delighted to have his days of escorting daughters approaching an end.

As the eldest son of the Duke of Langford, Nathaniel Gresham sees his arranged marriage to Lady Violet Devere as just another obligation to fulfil – highly suitable, if unexciting. But as Violet sets out to transform herself from dowdy wallflower to dazzling young duchess-to-be, proper Nathaniel sets out to prove he's a match for his new bride's vivacity and daring.

Miss Dinah Ashmore has a problem: her sister has gone missing, and the constable isn’t taking it seriously. She decides to take matters into her own hands by hiring a Bow Street Runner, not understanding the danger she has put herself in. Nathaniel Calvert, Earl of Hawthorne, is an agent of the Crown. His assignment is to root out a radical group and bring them to justice. When Miss Ashmore mistakes him as a Bow Street Runner and explains her plight, he suspects that the missing sister might be connected to his case.

At twenty-two, Rosalie Harrow is unmarried and near destitute. She has two choices: snag a wealthy gentleman, or take work as a governess. Neither option appeals to headstrong Rosalie. When Rosalie receives an invitation to Alcott Hall, she believes she's there to meet the Dowager Duchess of Norland. Instead, Rosalie is thrust in the middle of a house party of eligible high society ladies all desperate to win the hand of the new, conveniently single duke.