With her headful of wild curls and wilder ideas and an unabashed love of experiments and explosives, society has labeled Lady Imogen Loveless peculiar…and doesn’t know she’s one of the Hell’s Belles—a group of vigilantes operating outside the notice of most of London.

He’s controlled. Meticulous. Immaculate. No one would expect the proper Duke of Westmead to be a member of London’s most illicit secret club. Least of all: his future wife. Having overcome financial ruin and redeemed his family name to become the most legendary investor in London, the Duke of Westmead needs to secure his holdings by producing an heir. Which means he must find a wife who won’t discover his secret craving to spend his nights on his knees - or make demands on his long scarred-over heart.

England, 1865: Newspaper columnist Lady Katherine Bascomb finds herself the subject of speculation when her latest article leads to an arrest in the murders plaguing London. The English believe women ought not to write about such vulgar things as crime, and a particularly attractive detective inspector is incensed that she's interfered with his investigation. To escape her sudden notoriety, Katherine heads to the country - only to witness a murder upon her arrival.

Spirited debutante Lady Olivia McLeod, cherished daughter of the Duke and Duchess of Strathaven, has two interests: solving mysteries and winning the love of her rescuer and secret crush, the infamous Duke of Hadleigh. When Livy joins Lady Charlotte Fayne's charity for young ladies and discovers that it is a front for a covert investigative agency, she is thrilled. Livy dedicates herself to solving a deadly case. Little does she realize that the path to danger will also lead to her heart's deepest desire.

Fiercely loyal to his friends and comrades, Ewan Mostyn is the toughest in a group of younger sons of nobility who met as soldiers and are now trying desperately to settle back into peaceful Society. Ewan trusts his brawn more than his brains, but when he's offered a job watching the Duke of Ridlington's stubbornly independent daughter, he finds both are challenged. Lady Lorraine wants none of her father's high-handed ways, and she'll do everything in her power to avoid her distressingly attractive bodyguard - until she lands herself in real trouble.

Thrice wedded, but never bedded, Mathilde Martindale has long lived in the shadow of her indomitable mother, and meekly done as she was told. Until one day she decides to become mistress of her own destiny and leave the royal court to find her own path.

Born into an aristocratic family, yearning for a life beyond Society’s strictures, Marguerite “Daisy” Townsend is an enterprising sleuth. Hired to obtain proof of a wife’s infidelity, she secures a position in the household of the woman’s lover, never expecting to be lured into the seductive blackguard’s arms herself. Devilishly handsome, David Blackwood, known widely as Bishop, quickly realizes the enticing maid is interested in far more than dusting. She aims to uncover his sins. Although tempted by the dangerous beauty, he can’t risk her learning the truth.

Miss Cleopatra Lewis is about to be launched in society by her aristocratic grandfather. But since she has no intention of marrying, she visits a costume emporium specifically to order unflattering dresses guaranteed to put off any prospective suitors. Powerful and charismatic Jacob Astor Addison is in London, acquiring businesses to add to his theatrical holdings in America—as well as buying an emerald for a young lady back in Boston. He’s furious when a she-devil masquerading as an English lady steals Quimby’s Costume Emporium from under his nose.

Self-made civil engineer Geoffrey Brookhouse has unexpectedly inherited the dukedom of Greenwood. But he has a secret that could ruin his family. Hoping to save his timid sister from that fate, he seeks to marry her off to a respectable, protective gentleman. With the London Season imminent, Geoffrey hires Elegant Occasions to orchestrate her debut. Yet Lady Diana Harper, spirited fashion expert, proves more than he bargained for. Suddenly, Geoffrey’s sister is emerging from her shell, and he is beleaguered with social invitations and gossip!

The Bellamy family has four months before they'll lose the roof over their heads. While Phoebe's older sisters venture out into the world to earn the necessary funds, Phoebe herself stays home to care for her younger siblings and parents. But then she meets Viscount Needham, a wealthy new peer, and everything changes.

After years of living as London’s brightest scandal, Lady Sesily Talbot has embraced the reputation and the freedom that comes with the title. No one looks twice when she lures a gentleman into the dark gardens beyond a Mayfair ballroom...and no one realizes those trysts are not what they seem. No one, that is, but Caleb Calhoun, who has spent years trying not to notice his best friend’s beautiful, brash, brilliant sister.

Lady Vesper Lyndhurst is beautiful, clever, and popular. Afforded every luxury as a duke’s daughter, she fills her days with friends, intrigues, and a self-professed knack for matchmaking. She may have sworn off love for herself, but she is rather excellent at arranging it. Faced with an insolvent estate, the Duke of Greydon has no choice but to return to England in a final attempt to revive his family’s fortunes. He’s been gone for years, happy to have escaped his mother and the petty circles of the ton. To his dismay, not much has changed, including the beautiful heiress next door.

Lady Honora Parker must get engaged as soon as possible, and only a particular type of man will do. Nora seeks a mate so abhorrent, so completely unacceptable, that her father will reject the match—leaving her free to marry the artist she loves. Who then is the most appalling man in Manhattan? The wealthy, devilishly handsome financier, Julius Hatcher, of course….

Wealthy society maven Lady Gertrude knows how the world works. If her husband is less than faithful, it’s an acceptable price to pay for her coveted position at the apex of London’s most fashionable set. No exclusive soirée or lavish ball is complete without her and her group of decadent, well-connected friends. And this Season promises more excitement than usual: Tru is launching her daughter into Society, helping her navigate the cutthroat Marriage Mart, complete with fortune hunters, jealous debutantes, and malicious gossips.

Thea Knight loves a spot of mischief. She especially loves her current mischief: masquerading as her sister, while finalizing her scheme to expose the dastardly knaves whose lies ruined her life. Then big, bad-tempered Lord Luxborough upends her game by maneuvering her into marriage. But it's her sister’s name on the license, so the marriage won’t be valid. Thea’s idea? Keep pretending to be her sister until she can run away.