This document discusses literary criticism and different approaches for analyzing literature. It provides an overview of various literary theories including moral criticism, formalism, psychoanalytic criticism, Marxist criticism, reader-response criticism, structuralism/semiotics, post-structuralism/deconstruction, new historicism/cultural studies, post-colonial criticism, feminist criticism, and gender/queer studies. It then gives examples of analyzing the children's poem "Mary Had a Little Lamb" from historical, formalist, and psychological perspectives to demonstrate how different theories can provide different interpretations. The document encourages the reader to try applying an unspecified theory to the poem "Humpty Dumpty."