Wow no, I'm not taking the **** saundthorp.  What do you mean?

I for one am totally serious, pace John McEnroe!  , I don't think something written in a book is evidence of anything.  Evidence is fact based,  and may come from something that can be replicated easily or corroborated by more than one. Ask the CID !

One doesn't normally find evidence in a book.

That statement quite took my breath away, JJ. Where did a lot of the evidence for early Christianity come from, the written words of the early writers of Christianity, the Apostles, Paul's writings, the so called Early Fathers of the Church. To bring it bang up to date. Where is a lot of evidence in the phone hacking scandle coming from, emails.
Surely you have heard the expression "a paper trail" in investigations.
The evidence for the "Final Solution" in Hitler's Germany came from notes and letters written at the time. The written word has sunk many a criminal and the written word has provided the evidence for the Truth of the Bible.
The Bible is not just "a book", or is that just how you regard the Bible?