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The Valley of Fear Sir Arthur Conan Doyle
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The Valley of Fear
Sir Arthur Conan Doyle
Sherlock Holmes receives a cipher message from Fred Porlock, a pseudonymous agent of Professor Moriarty. After Porlock sends the message, however, he changes his mind for fear of Moriarty's discovering that he is a traitor. He decides not to send the key to the cipher, but he sends Holmes a note telling of this decision. From the cipher message and the second note, Holmes is able to deduce that it is a book cipher and that the book used for the encryption is a common book, large (with at least 534 pages), printed in two columns per page, and standardised. An almanac fits these conditions exactly.
| Media | Books Paperback Book (Book with soft cover and glued back) |
| Released | January 5, 2021 |
| ISBN13 | 9798588579605 |
| Pages | 120 |
| Dimensions | 127 × 203 × 7 mm · 136 g |
| Language | English |
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