Final answer:
The literary work mentioned is 'The Cask of Amontillado' by Edgar Allan Poe. The main theme of this literary work is Deception and Revenge. Fortunado is the antagonist in the mentioned story.
Step-by-step explanation:
In the given paragraph, the literary work mentioned is The Cask of Amontillado by Edgar Allan Poe. The main theme of this literary work is Deception and Revenge. In the mentioned story, Fortunado is the antagonist.