Here's a link from the blog, Literary Exploration, to a very interesting explanation of satire. It's well worth a read. Below is the article's beginning.
"I was reading a review the other day, when I saw them say “being a satire, I expected it to be funny” which, at the time, really annoyed me: I wanted to become that guy who replies with “I don’t think you get it”. The truth of the matter is I was someone that thought satire was a form of comedy for a very long time too. I think it wasn’t until someone called 1984 a satirical novel did I actually think “hang on, maybe I need to look up this word”. So I thought instead maybe this could make a good blog post" . . . continued