I agree with everything you've said. Chapter 19, while written in a slightly different style from the earlier chapters, had alot of important elements in it. It seems the style has shifted from 1st to 3rd to help incorporate the other 2 main characters. I like to think of it as Matt's shift from not having friends to having friends and his persepective on that matter and how he conducts himself has changed. Really, really, really looking foward to Chapter 20