When crusading lawyer Vikram Pandey sets out in search of a missing youth, his investigations take him to Holywell Street, London's most notorious address. He expects to find a disgraceful array of sordid bookshops. He doesn't expect one of them to be run by the long-lost friend whose disappearance and presumed death he's been mourning for 13 years. Gil Lawless became a Holywell Street bookseller for his own reasons, and he's damned if he's going to apologize or listen to moralizing from anyone.

Robin Loxleigh and his sister Marianne are the hit of the Season, so attractive and delightful that nobody looks behind their pretty faces. Until Robin sets his sights on Sir John Hartlebury's heiress niece. The notoriously graceless baronet isn't impressed by good looks, or fooled by false charm. He's sure Robin is a liar - a fortune hunter, a card sharp, and a heartless, greedy fraud - and he'll protect his niece, whatever it takes.

Sir Philip Rookwood is the disgrace of the county. He's a rake and an atheist, and the rumors about his hellfire club, the Murder, can only be spoken in whispers. (Orgies. It's orgies.) Guy Frisby and his sister, Amanda, live in rural seclusion after a family scandal. But when Amanda breaks her leg in a riding accident, she's forced to recuperate at Rookwood Hall, where Sir Philip is hosting the Murder. Guy rushes to protect her, but the Murder aren't what he expects. Sir Philip turns out to be charming, kind - and dangerously attractive.

Abandoned by his father, Gareth Inglis grew up lonely, prickly, and used to disappointment. Still, he longs for a connection. When he meets a charming stranger, he falls head over heels—until everything goes wrong and he's left alone again. Then Gareth's father dies, turning the shabby London clerk into Sir Gareth, with a grand house on the remote Romney Marsh and a family he doesn't know. The Marsh is another world, a strange, empty place notorious for its ruthless gangs of smugglers. And one of them is dangerously familiar…

Will Darling came back from the Great War with a few scars, a lot of medals, and no idea what to do next. Inheriting his uncle's chaotic secondhand bookshop is a blessing...until strange visitors start making threats. First a criminal gang, then the War Office, both telling Will to give them the information they want, or else. Will has no idea what that information is, and nobody to turn to, until Kim Secretan - charming, cultured, oddly attractive - steps in to offer help. As Kim and Will try to find answers and outrun trouble, mutual desire grows along with the danger.