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

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

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Author: Bonnie MacBird
ISBN: 9780008380892
Publisher: HarperCollins Publishers
Year first published: 16 Jun 2025
Pages: 384
Format: Paperback / softback

Holmes and Watson face treachery and danger in the latest 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.


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