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The Serpent Under: Treachery, Twists and Terror in Baker Street

A Sherlock Holmes Adventure, Book 6

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The Serpent Under: Treachery, Twists and Terror in Baker Street

By: Bonnie MacBird
Narrated by: Simon Darwen
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About this listen

Holmes and Watson face treachery and danger in this full-length thriller by Bonnie MacBird, author of the bestselling Sherlock Holmes novel Art in the Blood.

Murder, jealousy, and deceit underscore three interlocking mysteries as Holmes and Watson take on a high-profile case at Windsor Castle, a boy drowned in the Serpentine, and a crusading women’s rights activist who suspects a traitor in her organisation. The cases send them into danger into locales as varied as the palace itself, a dockland cannery, an arts and crafts atelier, and a gypsy encampment. But is there peril underfoot as well – right at 221B Baker Street?

The twisting, breathlessly plotted conjoined mysteries that Bonnie MacBird is known for provide a thrill ride that will delight Sherlockians worldwide.

©2025 Bonnie MacBird (P)2025 HarperCollins Publishers
Crime Thrillers Historical Police Procedurals Suspense Traditional Detectives

Critic Reviews

“What could be a better present this season than a new Christmas case for Sherlock Holmes? Bonnie MacBird’s worthy pastiche takes us back to 221B Baker Street in a snowy Victorian December.” —The Wall Street Journal

“The brilliant MacBird manages to produce a tale which is both authentic and original, yet pays homage to the genius of Arthur Conan Doyle.”
Dundee Courier

“Neatly emulates the style and tone of Arthur Conan Doyle’s original stories … If you’re in the mood for light seasonal entertainment, albeit with a serious underlay, look no further.”
—Michael Dirda, Washington Post

“Perfectly captures the essence of Conan Doyle's fiction.”—Independent

“No one can surpass Conan Doyle at his best, but a select few pastiche writers get close enough that they can almost reach out and touch the master. Bonnie MacBird is one of those writers that achieves this consistently. If you need a Holmes story for Christmas (and who doesn't?) get hold of this immediately.”—The Doyleockian

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