After her foray into murder investigation, Lady Kiera Darby must journey to Edinburgh with her family so that her pregnant sister can be close to proper medical care. But the city is full of many things Kiera isn't quite ready to face: the society ladies keen on judging her, her fellow investigator (and romantic entanglement) Sebastian Gage, and ultimately, another deadly mystery.

Returning to her childhood home, Lady Kiera Darby hopes her beloved brother Trevor and the merriment of the Hogmanay Ball will distract her. But when a caretaker is murdered and a grave is disturbed at nearby Dryburgh Abbey, Kiera is once more thrust into the cold grasp of death. While Kiera knows that aiding in another inquiry will only further tarnish her reputation, her knowledge of anatomy could make the difference in solving the case.

July 1831. In the midst of their idyllic honeymoon in England's Lake District, Kiera and Gage's seclusion is soon interrupted by a missive from her new father-in-law. A deadly incident involving a distant relative of the Duke of Wellington has taken place at an abbey south of Dublin, Ireland, and he insists that Kiera and Gage look into the matter.

Scotland, 1831. After a tumultuous courtship complicated by three deadly inquiries, Lady Kiera Darby is thrilled to have found both an investigative partner and a fiancé in Sebastian Gage. But with her well-meaning - and very pregnant - sister planning on making their wedding the event of the season, Kiera could use a respite from the impending madness. Commissioned to paint the portrait of Lady Drummond, Kiera is saddened when she recognizes the pain in the baroness' eyes.

January 1832. After enjoying a delightful few weeks with her family, expectant mother Kiera and Sebastian Gage have been invited to the Duchess of Bowmont's Twelfth Night party in Traquair, Scotland. Though she normally avoids such fashionable, rambunctious events, Kiera is ready to join in the festive merrymaking. But upon their arrival at the opulent estate, it becomes obvious that all is not merry in their hostess's home. The family appears to be under a great strain, and someone seems determined to cause mayhem among the guests with a series of forged notes.

After fleeing London in infamy more than two years prior, Lady Kiera Darby's return to the city is anything but mundane, though not for the reasons she expected. A gang of body snatchers is arrested on suspicion of imitating the notorious misdeeds of Edinburgh criminals Burke and Hare - killing people from the streets and selling their bodies to medical schools. Then Kiera's past - a past she thought she'd finally made peace with - rises up to haunt her.    

Argyll, Scotland. July 1832. After a trying few months in Edinburgh, Kiera and her husband and investigative partner, Sebastian Gage, are eager to escape to the Highlands with their three-month-old child. Kiera is overjoyed for her cousin Rye and her friend Charlotte, who are being wed in a private ceremony at the estate of Rye's great-uncle, the Marquess of Barbreck, in what seems to be the perfect wedding party. But when Kiera is invited to peruse Barbreck's extensive art collection, she is disturbed to discover that one of his most priceless paintings seems to be a forgery. 

Edinburgh, Scotland. March 1832. Kiera and Gage have been eagerly awaiting their bundle of joy but trouble has been brewing in the form of the roguish criminal Bonnie Brock Kincaid. A new book and subsequent play features some of Kincaid's daringly heinous exploits, although he swears he had nothing to do with it or the characters which are obvious representations of Kiera and Gage. A rash of crimes break out across the city, seemingly inspired by the play and book. Then the publisher is found brutally murdered.

When Lord Wrexford discovers the body of a gifted inventor in a dark London alley, he promptly alerts the watchman and lets the authorities handle the matter. But Wrexford soon finds himself drawn into the murder investigation when the inventor's widow begs for his assistance, claiming the crime was not a random robbery. It seems her husband's designs for a revolutionary steam-powered engine went missing the night of his death. The plans could be worth a fortune and very dangerous in the wrong hands.

Though Charlotte Sloane's secret identity as the controversial satirical cartoonist A. J. Quill is safe with the Earl of Wrexford, she's ill prepared for the rippling effects sharing the truth about her background has cast over their relationship. She thought a bit of space might improve the situation. But when her cousin is murdered and his twin brother is accused of the gruesome crime, Charlotte immediately turns to Wrexford for help in proving the young man's innocence. The brooding scientist is just as enigmatic and intense as ever, but there is now an unfamiliar tension.

The Earl of Wrexford possesses a brilliant scientific mind, but boredom and pride lead him to reckless behavior. He does not suffer fools gladly. So when pompous, pious Reverend Josiah Holworthy publicly condemns him for debauchery, Wrexford unsheathes his rapier-sharp wit and strikes back. As their war of words escalates, London's most popular satirical cartoonist, A. J. Quill, skewers them both.

January 1889. As the newest member of the Curiosity Club - an elite society of brilliant, intrepid women - Veronica Speedwell is excited to put her many skills to good use. As she assembles a memorial exhibition for pioneering mountain climber Alice Baker-Greene, Veronica discovers evidence that the recent death was not a tragic climbing accident but murder.

It is every mama's dearest wish that her daughter marries well. But how to ensure that a seemingly earnest suitor is not merely a fortune hunter? Rosalind is involved in just such a case, discreetly investigating a client's prospective son-in-law, when she is drawn into another predicament shockingly close to home.

Inspector Treadles, Charlotte Holmes’ friend and collaborator, has been found locked in a room with two dead men, both of whom worked with his wife at the great manufacturing enterprise she has recently inherited. Rumors fly. Had Inspector Treadles killed the men because they had opposed his wife’s initiatives at every turn? Had he killed in a fit of jealous rage because he suspected Mrs. Treadles of harboring deeper feelings for one of the men? To make matters worse, he refuses to speak on his own behalf, despite the overwhelming evidence against him. 

He’s a myth. A ghost. A legend. A Bratva assassin so feared, some won’t even dare to speak his name. He comes in search of vengeance for the death of his brother, but what he finds instead is me. A girl he thinks is someone else. Someone unrelated to the man who killed his brother. Except I am. And when he finds out my true identity, he decides to take me as repayment for what he lost. Now, I’m a little bird trapped in a cage, and the only way to survive is to make friends with the monster who captured me. But, friendship isn’t what the monster has in mind.