The Serpent Under: Treachery, Twists and Terror in Baker Street (A Sherlock Holmes Adventure, Book 6) cover art

The Serpent Under: Treachery, Twists and Terror in Baker Street (A Sherlock Holmes Adventure, Book 6)

Treachery, Twists and Terror in Baker Street

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The Serpent Under: Treachery, Twists and Terror in Baker Street (A Sherlock Holmes Adventure, Book 6)

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

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.

©2025 Bonnie MacBird (P)2025 HarperCollins Publishers
Crime Thrillers Historical Mystery Police Procedurals Suspense Thriller & Suspense Traditional Detectives Fiction Sherlock Holmes

Critic Reviews

"Combining a convincing imitation of Watson’s narrative style with a labyrinthine plot for Holmes to navigate, MacBird’s sixth excursion into Victorian London is a treat for all Sherlockians." —Sunday Times

"Replete with Sherlockian tradition … recommended to aficionados of Conan Doyle as well as to all readers of historical detective fiction." —Entertainment Focus

"An impressive tale that'll have you turning the pages as fast as you can." —Belfast Telegraph

“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.” —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.” —The Doyleockian

“A clever re-imagining of our old friend, and very, very readable.’ —Fully Booked

“The author’s latest Sherlock Holmes Adventure is filled with thrills, drama and twists to make it one of the best ones of the series to date.” —Love London Love Culture

"One of the all-time great Holmesian pastiche writers delivers a masterful, twist-filled adventure that flawlessly captures Watson's narrative voice. A must-read." —Sherlock Holmes Magazine

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This is a cut above the average Sherlock writer. Story is solid. Some of the earlier reads in this series are slightly better overall.

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