What book must someone love to be friends with you?

io9 was at it again with an interesting article titled I refuse to be friends with anybody who doesn’t love this book.

It’s okay to disagree with your friends or loved ones about certain things. But still, some things are sacred. Which science fiction or fantasy book is so essential, you’d refuse to be friends with (or to date) someone who didn’t like it?

There seem to be a few readers here so I thought it would be an interesting question to ask.

What book/movie/show/anything is a non-negotiable to be friends with you? Please take this question however seriously you wish. I’ interested in seeing what sort of things people like to read/watch.

Perhaps the question might be better asked, “What piece of fiction do you love that lets you bond with someone else who loves it almost instantly?”, which is much clunkier but a friendlier question.

I don’t know if there is anything in the first camp for me (Although John C. Wrights dislike of Paul Verhoven’s Starship Troopers movie may yet drive a wedge between us!) but it seems there is a lot of possibilities in the second camp. Certainly, Star Wars, Star Trek, Stargate, Heinlein, Turtledove, Firefly, Judge Dredd, that will do for a start.

So what say you?