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✦ 221B · LONDON ✦
Horizons Language · English B1 · Complete interactive mystery
The Red-Headed
League
The book you write
🔍
You are not simply reading a Sherlock Holmes mystery. By choosing every missing form, you rebuild thirty-six case-file pages and follow each clue from a ridiculous advertisement to a midnight trap.
Based on the public-domain work “The Red-Headed League” by Arthur Conan Doyle. New English educational adaptation.
This interactive educational book is based on “The Red-Headed League” 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. 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.
This interactive educational book is based on “The Red-Headed League” 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. 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.
© 2026 Horizons Language. All rights reserved.