Series order taken from author's website.

"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"--Amazon.com

In 1592, Sir Robert Carey, a handsome courtier, comes north to Carlisle to take up his new post as Deputy Warden of the West March. He has wangled his appointment to be nearer his true love, a married woman, and far from the gimlet eyes of his creditors and the disapproving eye of his father. Sir Robert is quick to realize he won't see any perks from the job if he fails to keep the peace. Alas, he is quickly challenged by the murder of a local lad, the possible betrayal of a disappointed rival, the ire of the lady's husband, and the question of the horses – the hundreds of horses being stolen from all over the neighborhood. It's hard to say whether the greater danger lies without the city walls amidst the scheming Scots – or within, amidst the unruly English garrison.

The fourth in a brilliant historical mystery series for fans of Deanna Raybourn, Tasha Alexander, and Amanda Quick A wealthy lord, who also happens to be a brilliant scientist, and a young widow who secretly pens satirical political cartoons, must team up to solve a shocking murder in regency London. The murder of a shipping clerk . . . the strange disappearance of trusted friends . . . rumors of corruption within the powerful East India Company . . . all add up to a dark mystery entangling Lady Charlotte Sloane and the Earl of Wrexford in dangerous web of secrets and lies that will call into question how much they really know about the people they hold dear--and about each other . . . When Lady Cordelia, a brilliant mathematician, and her brother, Lord Woodbridge disappear from London, rumors swirl concerning fraudulent bank loans and a secret consortium engaged in an illicit--and highly profitable--trading scheme that threatens the entire British economy. The incriminating evidence mounts, but for Charlotte and Wrexford, it's a question of loyalty and friendship. And so they begin a new investigation to clear the siblings' names, uncover their whereabouts, and unravel the truth behind the whispers. As they delve into the murky world of banking and international arbitrage, Charlotte and Wrexford also struggle to navigate their increasingly complex feelings for each other. But the clock is ticking--a cunning mastermind has emerged . . . along with some unexpected allies--and Charlotte and Wrexford must race to prevent disasters both economic and personal as they are forced into a dangerous match of wits in an attempt to beat the enemy at his own game.

Young Queen Elizabeth I's path to the throne has been a perilous one, and already she faces a dangerous crisis. French troops have landed in Scotland to quell a rebel Protestant army, and Elizabeth fears once they are entrenched on the border, they will invade England. Isabel Thornleigh has returned to London from the New World with her Spanish husband, Carlos Valverde, and their young son. Ever the queen's loyal servant, Isabel is recruited to smuggle money to the Scottish rebels. Yet Elizabeth's trust only goes so far-Isabel's son will be the queen's pampered hostage until she completes her mission. Matters grow worse when Isabel's husband is engaged as military advisor to the French, putting the couple on opposite sides in a deadly cold war. Set against a lush, vibrant backdrop peopled with unforgettable characters and historical figures, "The Queen's Gamble" is a story of courage, greed, passion, and the high price of loyalty. . . "Kyle is adept at layering her tale with colorful descriptions, accurate details and exciting twists within a fast-paced plot designed to keep readers' attention." --"Romantic Times" on "The Queen's Captive" "Unfurls a complex and fast-paced plot, mixing history with vibrant characters." --"Publishers Weekly" on "The King's Daughter " "Riveting, heady, glorious, inspired." --Susan Wiggs on "The Queen's Lady"

In Regency London, an unconventional scientist and a fearless female artist team up to trap a cold-hearted killer: “Thoroughly enjoyable” (Deanna Raybourn, New York Times–bestselling author). The Earl of Wrexford possesses a brilliant scientific mind, but boredom and pride lead him to reckless behavior. 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. But then the clergyman is found slain in a church—his face burned by chemicals, his throat slashed ear to ear—and Wrexford finds himself the chief suspect. An artist in her own right, Charlotte Sloane has secretly slipped into the persona of her late husband, using his nom de plume, A.J. Quill. When Wrexford discovers her true identity, she fears it will be her undoing. But he has a proposal—use her sources to unveil the clergyman’s clandestine involvement in questionable scientific practices, and unmask the real murderer. Soon Lord Wrexford and the mysterious Mrs. Sloane plunge into a dangerous shadow world hidden among London’s intellectual enclaves to trap a cunning adversary—before they fall victim to the next experiment in villainy . . . “Sharp, engaging characters, rich period detail, and a compellingly twisty plot, Andrea Penrose delivers a winner.” —Deanna Raybourn, New York Times–bestselling author “Fans of C.S. Harris take note! A riveting ride through Regency London, from the slums of St. Giles, to the mansions of Mayfair.” —Lauren Willig, New York Times–bestselling author “Historical chemistry meets alchemy . . . A delight of a book.&rdquo

The riveting true story of mother-and-daughter queens Catherine de' Medici and Marguerite de Valois, whose wildly divergent personalities and turbulent relationship changed the shape of their tempestuous and dangerous century. Set in magnificent Renaissance France, this is the story of two remarkable women, a mother and daughter driven into opposition by a terrible betrayal that threatened to destroy the realm. Catherine de' Medici was a ruthless pragmatist and powerbroker who dominated the throne for thirty years. Her youngest daughter Marguerite, the glamorous "Queen Margot," was a passionate free spirit, the only adversary whom her mother could neither intimidate nor control. When Catherine forces the Catholic Marguerite to marry her Protestant cousin Henry of Navarre against her will, and then uses her opulent Parisian wedding as a means of luring his followers to their deaths, she creates not only savage conflict within France but also a potent rival within her own family. Rich in detail and vivid prose, Goldstone's narrative unfolds as a thrilling historical epic. Treacherous court politics, poisonings, international espionage, and adultery form the background to a story that includes such celebrated figures as Elizabeth I, Mary, Queen of Scots, and Nostradamus. The Rival Queens is a dangerous tale of love, betrayal, ambition, and the true nature of courage, the echoes of which still resonate.