May I use quotations from another author along with Jonathan Safran Foer in my essay?
You need to be careful with outside sources in an analytical essay — the purpose of the essay is to explain how Extremely Loud and Incredibly Close comes to be meaningful. So quotations from another author in your body paragraphs are probably irrelevant. Such quotes might, however, be useful in either your introduction or your conclusion. You might use an outside quotation as a hook or to introduce the central purpose in the introduction, or you might use it in your conclusion to explain how your central purpose resonates with other literature or how it is important to your life.