What is the narrative technique that Albert Camus used in his short story "The Guest"?

The type of narration Camus uses in "The Guest" is called an interior monologue, which means that the only point of view the reader experiences is that of the main character. The Oxford Companion to English Literature (linked below) defines interior monologue as a form of first-person narrative in which the character's thoughts are "‘overheard’ by the reader without the intervention of a summarizing narrator." That is, we know what is happening in the story only through the main character's thoughts. Edgar Allan Poe used this style of narration in "The Tell-Tale Heart."