Mary Jekyll, alone and penniless following her parents’ death, is curious about the secrets of her father’s mysterious past. One clue in particular hints that Edward Hyde, her father’s former friend and a murderer, may be nearby, and there is a reward for information leading to his capture…a reward that would solve all of her immediate financial woes. But her hunt leads her to Hyde’s daughter, Diana, a feral child left to be raised by nuns. With the assistance of Sherlock Holmes and Dr. Watson, Mary continues her search for the elusive Hyde, and soon befriends more women, all of whom have been created through terrifying experimentation: Beatrice Rappaccini, Catherin Moreau, and Justine Frankenstein. When their investigations lead them to the discovery of a secret society of immoral and power-crazed scientists, the horrors of their past return. Now it is up to the monsters to finally triumph over the monstrous.

In the sequel to the critically acclaimed The Strange Case of the Alchemist’s Daughter, Mary Jekyll and the rest of the daughters of literature’s mad scientists embark on a madcap adventure across Europe to rescue another monstrous girl and stop the Alchemical Society’s nefarious plans once and for all. Mary Jekyll’s life has been peaceful since she helped Sherlock Holmes and Dr. Watson solve the Whitechapel Murders. Beatrice Rappaccini, Catherine Moreau, Justine Frankenstein, and Mary’s sister Diana Hyde have settled into the Jekyll household in London, and although they sometimes quarrel, the members of the Athena Club get along as well as any five young women with very different personalities. At least they can always rely on Mrs. Poole. But when Mary receives a telegram that Lucinda Van Helsing has been kidnapped, the Athena Club must travel to the Austro-Hungarian Empire to rescue yet another young woman who has been subjected to horrific experimentation. Where is Lucinda, and what has Professor Van Helsing been doing to his daughter? Can Mary, Diana, Beatrice, and Justine reach her in time? Racing against the clock to save Lucinda from certain doom, the Athena Club embarks on a madcap journey across Europe. From Paris to Vienna to Budapest, Mary and her friends must make new allies, face old enemies, and finally confront the fearsome, secretive Alchemical Society. It’s time for these monstrous gentlewomen to overcome the past and create their own destinies.

Mary Jekyll and the Athena Club race to save Alice—and foil a plot to unseat the Queen, in the electrifying conclusion to the trilogy that began with the Nebula Award finalist and Locus Award winner The Strange Case of the Alchemist’s Daughter. Life’s always an adventure for the Athena Club...especially when one of their own has been kidnapped! After their thrilling European escapades rescuing Lucinda van Helsing, Mary Jekyll and her friends return home to discover that their friend and kitchen maid Alice has vanished—and so has their friend and employer Sherlock Holmes! As they race to find Alice and bring her home safely, they discover that Alice and Sherlock’s kidnapping are only one small part of a plot that threatens Queen Victoria, and the very future of the British Empire. Can Mary, Diana, Beatrice, Catherine, and Justine save their friends—and save the Empire? Find out in the final installment of the fantastic and memorable Extraordinary Adventures of the Athena Club series.