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.

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.

Nina Finch isn't suited for a life of crime. Raised by her art-forger brother, she can paint like Botticelli. But she'd so much rather be baking gooseberry tarts. She finally has the money she needs to open her own bakery. Unfortunately, her brother's carelessness lands her—and their forgeries—directly under the nose of London's most discerning art critic, Alan De'Ath. De'Ath knows the paintings are fake.

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.

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.