When things don't go as planned, Felicia and Gideon have to not only fight their unwanted, growing attraction but also the evil-doer who seems intent on sabotaging their work. Even worse, it can only be someone within Tenwick Abbey that is trying to subvert their mission. Someone in their midst is an enemy spy. With their research in shambles and their lives in danger, Gideon and Felicia realize they can only trust each other. Will they be able to perfect the serum in time to protect England...and themselves?

Lady Katherine would rather chase clues than suitors. Her reputation as a matchmaker could give her the cover she needs to follow in her detective father's footsteps. If she catches the Pink Ribbon Killer before he strikes again, she'll win her dowry and her independence in the process. One look through the exclusive Northbrooke estate house party doubles her suspect list. With the help of her trusty maid and her precocious pug, Katherine risks it all to unmask the killer. But is winning her freedom worth putting another debutante in mortal danger?

As the city prepares to celebrate Queen Victoria's golden jubilee, Veronica Speedwell is marking a milestone of her own. After burying her spinster aunt, the orphaned Veronica is free to resume her world travels in pursuit of scientific inquiry - and the occasional romantic dalliance. As familiar with hunting butterflies as she is fending off admirers, Veronica wields her butterfly net and a hatpin with equal aplomb, and with her last connection to England gone, she intends to embark upon the journey of a lifetime.

Twenty-four-year-old Catherine Fellingham keeps a low profile - in society and in her family. A practical young woman, she leaves the spotlight to her beautiful younger sister and prefers quiet pursuits such as reading. But all that changes the moment she learns of her mother’s very excellent scheme to keep the family out of debtors’ prison. The scatter-brained Lady Fellingham has been selling commissions in the king’s army, and Catherine must shake off her indifference in order to save her family from a potentially ruinous scandal.

The widow Madeline Deveridge is both admired and feared by high society. Devastatingly beautiful, she is rumored to have killed her wealthy husband. Artemis Hunt is a handsome gentleman who is also a master of secret arts. His concentration on his own affairs is shattered, however, when Madeline demands his help one fog-shrouded night. Brought together by a mutual bargain - and a ghost - their bond sparks an attraction that will be far more dangerous than either suspects.

As half of the writing duo behind England’s most infamous crime column, Miss Caroline Hardcastle has quite the scandalous reputation. It may have cost her a fiancé, but she would much rather bring attention to crimes against those ignored by society than worry about what the ton thinks of her.

With her inquisitive mind, Charlotte Holmes has never felt comfortable with the demureness expected of the fairer sex in upper-class society. But even she never thought that she would become a social pariah, an outcast fending for herself on the mean streets of London. When the city is struck by a trio of unexpected deaths and suspicion falls on her sister and her father, Charlotte is desperate to find the true culprits and clear the family name.

Shunned by a society that puts attractiveness above all else, Lady Eliza Darby’s wallflower status keeps her from getting the one thing she wants most, namely, to be a mother. But, when her scorned older sister returns home to see all of her sisters wed in happy matches, it may be Eliza’s only chance to secure a husband and have the children she so desires. Jilted in a publicly humiliating display, Dax Kane, the Duke of Ashbourne, has sworn off love forever. But, when the title demands it, he selects the most perfect candidate for the position: Lady Eliza Darby.

At 30 years of age, Susan Jennings has long been considered a spinster. Exceptionally intelligent, she has little tolerance for London and the dreaded Season - if that’s how one is expected to find love, it’s not for her. But when an invitation arrives that cannot be ignored, Susan leaves her comfortable life in the country and enters the fashion and frivolity she most despises. She quickly discovers, however, that there is more to loathe in London - and his name is George Kendall.

Sebastian Cynster knows time is running out. If he doesn't choose a wife soon, his female relatives will line up to assist him. Yet the current debutantes do not appeal. Where is he to find the right lady to be his marchioness? Then Drake Varisey, eldest son of the Duke of Wolverstone, asks for Sebastian's aid.

When young cook Kat Holloway learns that the children of London's Foundling Hospital are mysteriously disappearing and one of their nurses has been murdered, she can't turn away. She enlists the help of her charming and enigmatic confidant Daniel McAdam, who has ties to Scotland Yard, and Errol Fielding, a disreputable man from Daniel’s troubled past, to bring the killer to justice. Their investigation takes them from the grandeur of Mayfair to the slums of the East End, during which Kat learns more about Daniel and his circumstances than she ever could have imagined. 

Since his return from war, the Duke of Ashbury's to-do list has been short and anything but sweet: brooding, glowering, menacing London ne'er-do-wells by night. Now there's a new item on the list. He needs an heir - which means he needs a wife. When Emma Gladstone, a vicar's daughter turned seamstress, appears in his library wearing a wedding gown, he decides on the spot that she'll do.

England, 1879. Annabelle Archer, the brilliant but destitute daughter of a country vicar, has earned herself a place among the first cohort of female students at the renowned University of Oxford. In return for her scholarship, she must support the rising women's suffrage movement. Her charge: recruit men of influence to champion their cause. Her target: Sebastian Devereux, the cold and calculating duke of Montgomery who steers Britain's politics at the queen's command.

Lady Violet is keeping secrets. First, she founded a clandestine sanctuary for England's most brilliant female scientists. Second, she is using her genius on a confidential mission for the Crown. But the biggest secret of all? Her feelings for protection officer Arthur Kneland. Solitary and reserved, Arthur learned the hard way to put duty first. But the more time he spends in the company of Violet and the eccentric club members, the more his best intentions go up in flames. Literally.

Deciding that true romantic heroes are a thing of the past, Eloise Kelly, an intelligent American who always manages to wear her Jimmy Choo suede boots on the day it rains, leaves Harvard's Widener Library bound for England to finish her dissertation on the dashing pair of spies the Scarlet Pimpernel and the Purple Gentian. What she discovers is something the finest historians have missed: a secret history that begins with a letter dated 1803.