When you would read this book for the first time it would be able to predict your thoughts exactly. Then as you would go amazed with it trying to figure out where the catch is - you would do the guessing game, by thinking of the sentence in your mind then reading same exact sentence by opening the page you haven't read before... and book would not miss once....
At this point you should conclude that ether you are high on psychedelics, or suffering from acute schizophrenia....
Book cannot prove God...
EDIT: The point I am trying to make is since you cannot trust your senses (Descartes) no external source (including books) will be reliable to prove/disprove God...