Edgar Allan poe's image is not just instantly recognizable ot is perfectly suited to his reputationn.From the prisoner strapped under a descending pendulum blade to  Raven refuses to leave the narrator's chamber pose Macabre and Innovative stories of Gothic horrorwhat is it that makes Edgar Allan Poe one of the greatest American Authors after all horror was a popular genre of the period With many practitioners Yet poe stood  out thanks to his careful attention to form and style as a literary critic,he identified two cardinal rules for the short story form:firstly,it  must be short enough to read in one sitting  secondly,every word was contribute to its purpose by mastering these rules Pokemon savita's attention underworld phone with intense and singular experience What poe called he unity of effect.