Dr Jekyll and his monstrous alter-ego join forces with his ex-fiancée to solve a series of disappearances across Victorian London in this thrilling mystery, perfect for readers of Stuart Turton and James Lovegrove. When Muriel Carew attends a lavish society party, the last person she expects to bump into is her ex-fiancée Henry Jekyll, a man she's not seen for many years. When Jekyll turns out to be investigating a series of missing persons in London, Muriel is intrigued. But Jekyll is not working alone, and if Muriel wants to aid in the investigation, she must work with both Henry and his partner, the monstrous and uncouth Mr Hyde. As their search takes a dark turn and a missing persons case becomes a murder investigation, Muriel finds herself deep in a mystery involving a nefarious group exploring their own hidden alter-egos within the beating heart of London's high society. To solve the case and bring those responsible to justice, Muriel must find a way to place her trust in Mr Hyde, which might mean uncovering secrets about her own life she never dreamed of discovering.

The Jekyll & Hyde detective agency must solve a locked-room mystery in this festive installment of the series. A tribute to classic Golden Age crime novels which is perfect for fans of Stuart Turton and Lucy Foley. Henry Jekyll and Muriel Carew infiltrate a Christmas artists’ retreat to investigate a series of death threats. Though the country manor is filled with festive cheer, stage rehearsals and jolly games, its colourful guests harbour dark secrets. Henry’s transformations into the brutish Edward Hyde are more frequent than ever, and Edward is as likely to create new problems as he is to aid the investigation. When a murder is committed onstage, heavy snow prevents the arrival of the police… which means that only the Jekyll & Hyde detective agency can solve the case.