Newly arrived in New Fiddleham, New England, 1890, and in need of a job, Abigail Rook meets R. F. Jackaby, an investigator of the unexplained with a keen eye for the extraordinary - including the ability to see supernatural beings. Abigail has a gift for noticing ordinary but important details, which makes her perfect for the position of Jackaby’s assistant.

In 1892 New Fiddleham, New England, things are never quite what they seem, especially when Abigail Rook and her eccentric employer, R. F. Jackaby, are called upon to investigate the supernatural. First, a vicious species of shape-shifters disguise themselves as a litter of kittens, and a day later their owner is found murdered with a single mysterious puncture wound.

Jenny Cavanaugh, the ghostly landlord of 926 Augur Lane, has enlisted the services of her detective-agency tenants to solve a decade-old murder - her own. Abigail Rook and her eccentric employer, R. F. Jackaby, dive into the cold case, starting with a search for Jenny's fiancé, who went missing the night she died. But when a new gruesome murder closely mirrors the events of 10 years prior, Abigail and Jackaby realize that Jenny's case isn't so cold after all.

The fate of the world is in the hands of detective of the supernatural R. F. Jackaby and his intrepid assistant, Abigail Rook. An evil king is turning ancient tensions into modern strife, using a blend of magic and technology to push Earth and the Otherworld into a mortal competition. Jackaby and Abigail are caught in the middle as they continue to solve the daily mysteries of New Fiddleham, New England - like who's created the rend between the worlds, how to close it, and why zombies are appearing around town.

This standalone adventure set in the world of the New York Times bestselling Jackaby series brims with humor, heart, and—of course—a hefty dose of supernatural mayhem. Abigail Rook never intended to be the mortal bridge between the human and supernatural world. But now, the power of the...