Without citing the bible, what marks the bible as the one book with God's message?

[HappySkeptic]

When you study a few hundred of these cases and see the consistency in them it build a very strong argument, and especially with children. 

Consistency doesn't mean "real", as in a real afterlife.

Consistency can mean commonality in how the brain works and shared mythology.  The human mind is also capable of ecstatic religious experience, but commonality of experience doesn't prove that a preacher from 2000 years ago was the actual physical "son" of a bronze age war god.

Consistency can also be the result of selection bias.  You find NDE stories that have commonality, when most people don't have NDE's, or have ones that don't fit your preconceptions.