Well friends, that has happened to me a lot and I am here to say that it is impossible to have read every single book in existence. There are millions of books in print these days, not to mention the various genres out there. Usually you only read books that are of interest to you. So sometimes, like my sister, you only read romance novels. Other times you read mystery books, and perhaps a little bit of a thriller when you have time. So why would you expect any of the individuals who I have just named to know what the best selling books in the Sci-Fi genre is, if they do not read those books?
It should not matter what books anybody reads or which ones they do not read. It is their choice and book snobs should not gauge. I will admit that there are many classics that I have never read. I also do not always read, but it does not mean that I am a literary moron either.