Why are the revelations in the Bible?

If someone could point me to a good web site, or has a good explanation.
Why did the revelations get into the Bible instead of the apocrypha? Its contents seem to me quite out of line with the rest of the New Testament.
Was it put in because it is such a good source for preaching material, Who was the “John” to whom the revelations were given and when are they dated from?

You may want to try this article.

Thanks for the link, it gives good information on who John may have been. But reinforces my view that it seems more to fit in more with the old testament than the new, or a good Christian read, but not part of the bible itself.

From http://en.wikipedia.org/wiki/Book_of_Revelation:

From http://en.wikipedia.org/wiki/Biblical_canon:

Well, not directly addressing the book of Revelation (there’s no “s” on the end), but the general topic of why some books were included and some excluded, you might try: Straight Dope Staff Report: Who wrote the Bible? (Part 5: How did the Bible come to be compiled?