Bilingual book to learn Spanish. In bilibook-editions the text is displayed alternately sentence by sentence in both languages. In addition, some words are marked, so you can quickly find them in the translation text.
This system helps you to maintain a comfortable reading flow. You do not have to read the entire translation to find the meaning of a word.
The story: A young London hydraulic engineer comes to Sherlock Holmes and Dr. Watson because of his missing thumb and explains what happened. He had accepted a job that brought him disaster.
