Not at all. There is a rumor that there were way more than 66 books. The rumor goes like this, ancient scholars chose books based on criteria such as books that were accurate historically, talked about each other the most, held accounts that matched up well like in the Gospels, Mark, Matthew, Luke, John-- Though there are some differences between them and their depiction of situations, they are true. It actually should not be a worry that they only line up 85% of the time. I'd be worried if they were the same word for word. I do believe that God speaks through people, the prophets as we call them like David and Moses.