The Sign of Four

The book you write

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You are not simply reading a mystery from Baker Street. By choosing every missing word, you rebuild thirty-six manuscript pages and become the writer of this detective adventure of clues, treasure, and deduction.

Based on the public-domain work “The Sign of Four” by Arthur Conan Doyle. New English educational adaptation.
This interactive educational book is based on “The Sign of Four” by Arthur Conan Doyle, a work in the public domain. The English text is a newly written educational adaptation and does not reproduce any modern translation, edition or adaptation. Educational adaptation, exercises, interactive structure, interface, code and original artwork © 2026 Horizons Language School. All rights reserved. This product is not affiliated with any film, television, publishing or commercial adaptation. This is an original English-language educational retelling based on the public-domain original work. It is not copied from, and does not reproduce, any modern English translation.

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The completed manuscript

You have written The Sign of Four.

Every page has been completed and checked. The narrator’s dark confession now carries your choices, corrections, and growing knowledge of English.

36pages completed

0%first-check accuracy

0mistakes studied

The Author