I heard that the Narnia books are Christian books. Is this a Christian MUCK?

In a word, yes. We uphold and respect the Christian theology that Lewis has woven into his Narnia Chronicles, and we expect our players to do the same. This does not mean, however, that you must be a Christian to play, nor does it mean that if you sign on you'll be flooded with evangelism literature. arniaMUCK is not a prosletyzing vehicle, and both Christians and non-Christians are expected to be respectful in discussions of faith.