A new edition of "The Sign of Four," Sir Arthur Conan Doyle's second full-length novel featuring Sherlock Holmes. This book is controversial for Holmes' use of cocaine.
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9 primary books10 released booksSherlock Holmes is a 40-book series with 9 primary works first released in 18 with contributions by Arthur Conan Doyle, Alejandro Pareja Rodríguez, and 13 others.
