By the way, I would strongly recommend Mason not try to touch Rost's book, it's the grimoir he inherited from his father and the thing is warded to hell and back six times over to prevent anything that isn't human from trying to use it.
@Blueflame I didn't think he was running from them. At least night at first. I thought it was a Dr. Jeckle and Mr. Hyde thing. He knew something happened at night and wanted to make sure others were safe.