This file includes all three of Edgar Allan Poes mystery stories featuring Detective C. August Dupin: The Murders in the Rue Morgue, The Mystery of Marie Roget, and The Purloined Letter. According to Wikipedia: Dupin is not a professional detective and his motivations for solving the mysteries change throughout the three stories. Using what Poe termed ratiocination, Dupin combines his considerable intellect with creative imagination, even putting himself in the mind of the criminal. His talents are strong enough that he appears able to read the mind of his companion, the unnamed narrator of all three stories.