Sherlock Holmes, the great detective, solves many strange mysteries in this collection of stories. Then he begins to see a pattern. Crime in London is being planned by an evil organization, led by the greatest criminal of them all, Professor Moriarty.

The Professor makes a small mistake, and Holmes helps the police to bring his organization to an end. But at the last minute, Moriarty escapes. Holmes and his friend Watson are in danger. They go abroad, to Switzerland, and there the detective and the master criminal meet for the last time. Watson returns to London alone.

Is this the end of Sherlock Holmes? Watson certainly thinks so. Then, two years later, an old bookseller comes to give Watson some important information.

Sir Arthur Conan Doyle was a doctor who enjoyed writing stories in his spare time. His tales of the detective, Sherlock Holmes, and his assistant, Dr Watson, are well known in countries all over the world.

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