I know nothing of the book, but I guess you will get out of the book what you put into it. If you are looking at the book so that you might know and believe that God walks among us, then you are looking for the book the teach you how he walks among us, and thus requires the scrutiny to prove whether or not it aligns completely with the scripture.
But, and I say this with a BUT; if you already possess the faith that God dwells in our hearts and that he truly does walk among us, then you would not be looking at the book in the same manner. You would no longer be scrutinizing it to prove its truth, you would read the book to simply hear someone Else's testimony and leave it at that. If they said something that stirs a though in your mind, then it is simply something that you that you will meditate on and let the Lord reveal to you his truth.
I think we do a huge disservice to ourselves and to each other when we feel the need to over analyze ever single word that someone says because it blinds us to the spirit of the message, and we do nothing but discredit and diminish someones testimony of God working in their heart and in their lives.
What would it make me if I felt the need to shout down or discredit the testimony of someone who in their own way was just sharing their walk with the Lord and glorifying God?
The title of the thread reminded me of the Footprints in the Sand poem.
http://www.footprints-inthe-sand.com/index.php?page=Poem/Poem.php