Sherlock, Lupin and Me. Book 15: The Top-hat Man Enigma

Written by Pierdomenico Baccalario, Alessandro Gatti

253 pages

Age 10+

Rights sold: French, Spanish and Catalan, Greek, Hungarian, Maltese, Turkish

A dead princess’s final clue, invisible writing on blank pages, and a race across Europe to stop a chemical weapon from falling into the wrong hands

London, 1919. Mila is still reeling from Anastasia’s death in Danzig when Sherlock Holmes begins to study the objects her sister died protecting: a hexagonal key and a note bearing the number 734 090. His deductions lead the group to a Swiss bank vault in Geneva, where apparently blank pages conceal part of a deadly chemical formula. To recover the missing half, Mila, Irene, Sherlock and Arsène Lupin must move through disguises, spies, murder and political intrigue from Switzerland to Germany, while the Bolshevik killer Marshal Kindjal and his allies close in. What begins as a code mystery soon becomes a fight to prevent a weapon of mass death from entering the modern world.


About the series:

Sherlock, Lupin & Me reinvents the childhood of three legendary literary figures, transforming them into a dynamic trio of young detectives. The books blend mystery, historical adventure and character-driven storytelling, offering readers atmospheric settings and clever, emotionally engaging plots.

Irene Adler is an originally character from the Sherlock Holmes stories by Sir Arthur Conan Doyle — becomes the narrator and moral centre of the series. In this reimagining, Irene recounts her early investigations with two boys who will one day become icons: Sherlock Holmes, the future master of deduction, and Arsène Lupin, destined to become the gentleman thief. Each volume offers a standalone case, while contributing to a long-form arc about friendship, identity, loyalty and the forging of three extraordinary lives.

Blending humour, intrigue, historical settings and emotional depth, the series has captivated young readers across multiple countries and continues to expand internationally.

A story by Book on a tree

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