Deep below the hills of the Buckinghamshire countryside, the infamous Hellfire Caves house a pleasure palace for the idle rich – a secret society steeped in satanism, opium and debauchery of the highest order. When the club’s warden, Antony Pennington, is brutally murdered, his bastard sister, Dora, must follow the clues to decode who the killer is, aided by an unexpected ally – ex-Army officer, former opium addict and son of a Viscount, Dr Jacob Sandys.

Investigative duo, Dora Fitz-Pennington and Dr Jacob Sandys, have escaped London and headed north to the Lakes, both needing time away from danger after their two most recent cases. Death, unfortunately, hasn’t got the message that it isn’t welcome to join them. Now, as William Wordsworth’s opus goes missing, and disappearances and a murder follow in quick succession, Dora and Jacob are forced to abandon their holiday and use their unique skills to track down a reckless killer intent on destroying the Romantic poets and all they stand for…

When seemingly fragile Miss Ivy Cavendale takes the headmistress position in an orphanage, it is her chance to stay anonymous in society. But not all is what it seems with Miss Ivy. When an intruder breaks in one night, she’s quick to draw her weapon, and while fear—her constant companion—has mysteriously disappeared, one thing is very clear: she and her charges are the next target of The Devil’s Sons.

Lady Hannah Simmons is a quintessential wallflower, unassuming, dowdy yet ignored by most. But underneath her plain exterior, Hannah is hiding a thrilling secret! Unbeknownst to the rest of the ton, she is Queen Victoria’s leading femme fatale, slipping unnoticed through the streets of London and listening to scandalous whispers from lords and ladies. But with daggers in her stockings and pistols in her pockets, Hannah's mission is to apprehend a deadly killer.

Sir Dominic De Lacy – one of the season’s most eligible gentlemen – has recently proposed marriage… to a woman he scarcely knows. But his father’s choice for him, Miss Maria Nightingale, seems amiable, and at 29, Dominic cannot live the life of a bachelor forever. He hopes he can provide a happy future for her as they learn to care for each other. Maria, however, has other ideas. Midway through their engagement celebrations, she confesses to Dominic that she is not Maria at all, but her identical twin sister, Margaret.