The Da Vinci Code

[The Former DMiller]

Well, the four gospels of the New Testament were all written independently by different people a few decades after Jesus' death, though they can't be considered unbiased sources. The Koran also mentions Jesus, and he is an important prophet of God according to Islam. The Jewish Torah also mentions Jesus' life, mainly by stating reasons why he wasn't the Messiah. The Dead Sea Scrolls that were found in the 50s also mention Jesus quite extensively, and those were actually written much closer to Jesus' death than the books of the Bible.

Anyway, apart from religious texts the only accepted reference to Jesus is a testimony by Josephus Flavius. It was originally considered a forgery since it sounded too Christian and Flavius was suppose to be a Jew, but new research has pretty much confirmed it is authentic. You can read about it here.