What is literary criticism?
How do I write a literary analysis?
Broadly speaking, literary analysis contextualizes a close reading of a text. That close reading could take on many forms. You could look at plot, character, narrative device, literary device, genre, symbolism, language, point of view, etc. In essence, you will take a part of the book and contextualize it by applying some sort of convention on to it. Those conventions could be a social or historical event or time period, a theory, philosophy, or school of thought.
Perspectives for Literary Analysis to consider:
Don't know where to start when writing a literary analysis?
This presentation by Purdue OWL is a great introduction/refresher and points out key elements to remember when writing a literary analysis.