A rough definition of Aesthetics in relation to Literature
Aesthetics (also spelled esthetics or æsthetics) is a branch of value theory which studies sensory or sensori-emotional values, sometimes called judgments of sentiment or taste. Aesthetics is closely associated with the philosophy of art.
In poetry, short stories, novels and non-fiction, authors use a variety of techniques to appeal to our aesthetic values. Depending on the type of writing an author may employ rhythm, illustrations, structure, time shifting, juxtaposition, dualism, imagery, fantasy, suspense, analysis, humor/cynicism, and thinking aloud.