I know for a fact it would not start off with a talking snake, magical fruit, invisible beings that desire beautiful women to have sex with.
And it wouldn’t end with a flying Dragon, a two horned lamb, locusts that resembled horses with men’s faces, but with women’s hair and teeth of lions.
And the book wouldn’t allow for hundreds of millions of religions to spurt from it.
I think the first thing a book written by God would have, is that it would be written in a way that all languages could understand WITHOUT BEING TRANSLATED.
Regardless of what language you would speak, we could read it and understand what it said.
Information that would help us understand diseases and genetic defects and how to treat them.
Information on how to avoid war and control population growth.
Whether God wanted to be worshiped or whether He just wanted us to live our life without any form of worship.
Updates every trillion years.
Being straight from the beginning, on whether his purpose for us was to live a limited life or if he had plans to have us live forever.