A critique looks like an essay, but it is shorter, less factual and more opinionated. This paper is set up in a format that includes an intro, a body of text and the conclusion. It usually does not include bulleted points, charts or images. It consists of words that state how one person feels about a literary piece of work.
You must write the critique in a formal way of speaking. You cannot use too many colloquialisms or make references that few people understand. The way you discuss a book to your friends is not the way you discuss it in formal writing. Use complete sentences, include details and remain courteous to the writer.
Examples are the most important parts of written critiques. For people who have not read the book, include examples or snippets to help them understand your interpretation. For instance, if you want to talk about certain characteristics of Hamlet, such as his courage or cleverness, include scenes to prove your point. The more examples you include, without giving away the spoilers, the more illustrated your writing becomes.