I found a good text online, about early christianity:
http://www.muslimhope.com/BibleAnswers/EarlyChurch.htm
...the text has nothing to do with islam at all, but it is published on a web-page that tries to reach out to moslems...(never mind that, it`s not important). In short, it`s an outline of early christianity, what the early church fathers believed and taught, and the text is also a defense for "traditional" christianity against all the modern adventist-offspring cults (jehovahs witnesses, mormons etc). Much of it deals with the early churchs view on christ, and the trinity. I think it`s very good, but I have no idea who wrote it. Check it out, it`s an interesting read, but a little long.