What's the famous science fiction novel you pretend to have read?

Come on, admit it. We all have at least one famous science fiction or fantasy novel that we've never actually read, but we've looked at the Cliff's Notes, or scanned the Wikipedia entry, so we can fake it. Now it's time to come clean — what's the novel you most often pretend to have read? (For me, this is a long list — although I often pretend to have read all the Narnia books when I really only read the first few and then gave up.)