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A few days ago I saw a copy of the german translation of "the old book" in a local store. I'm sorry to say it, but the translation is very bad. I enjoyed reading the english online version very much, both for its technical content AND for the entertaining style of writing. The german edition is like one of those funny translation programs for Windows was used. I'm not in the translating business, but in my opinion there is more to translating a book than putting sentence by sentence and word by word into another language. I recommend the english book to everyone working in this field. I do not recommend buying the german edition.