Hello ED500,
Welcome!!
You might have your work cut out for you. The first thing you might want to mention is that world time is set by JESUS CHRIST (i.e. BC, AD).
The best material written is obviously from the Bible, and the Bible proves itself. If you talk about writers other than Bible writers, the best ones are obviously going to be Christian or Jewish or both. The first two that come to mind are Philo and Flavius Josephus. I think that you can get FREE e-Books from both of them at Project Gutenberg.
http://www.gutenberg.net/This is at least an idea that won't cost you any money. If I understand you correctly, you really need and want LOST writers who were not Jewish or Christian. The pagan masses weren't known for education and writing books, so the search might be interesting.
I hope this helps a little bit.
Love In Christ,
Tom
Psalms 111:3 NASB Splendid and majestic is His work, And His righteousness endures forever.