This book kept me listening, rather than trying to decide whether to turn it off and give up, as is the case with so many Kindle Unlimited books, especially those with narration.  Interesting idea.  There were a few places that the author tried to bring in scientific facts, an  each time he did so, he missed the boat.  E.g.. While it's true that early in the 20th century there were studies that appeared to show a weight loss at the time of death of 21 grams, far more recent studies have shown no such loss.  One of the characters in the book, wonders why no one since that 1st  study has repeated it, as I already noted that they have.  Each time he does this I wonder why he didn't check his facts.  Books that weave strongly researched facts in with an original idea strengthen their characters and plot.  It diminishes the book.  The greatest books are those which weave in facts and fiction in such a way th a t they are nearly inseparable.  I am both a Christian and a scientist and though I really enjoyed the book, but more research and inclusion of it would have made for a better read.  I do think that this book presents clinched topics in a novel way, and that is a laudable achievement.  While the book dealt with evil, it wasn't a horribly dark book, which would have made me give up.  Suspense is fun, horror is depressing.  There are terrible things that happen in this book, but the author doesn't attempt to horrify you.