I'm currently working on fight #3 of this book and it's in the same format as the Egypt fight in book #2 (Ammit). For those of you who don't know the reference, it's a single fight, shown from three points of view (2 first person, 1 3rd). In film, this would be called a "cross-cutting" technique. There are countless examples of this in movieland, so I won't bother to name one. In literature, I don't know of any that wasn't merely a separation of content by chapter. I don't think I'm breaking new ground here, I just don't know of anything quite like this.
Personally, I like the way a fight comes out. It separates out the points of view during the fight without disturbing the flow of action. It also takes care of that pesky "well, didn't s/he show back up just in time for no reason" problem. The difficult part is establishing each of the character's voices well enough that there isn't a question of whose perspective is on display. Since I write all the chapters from different points of view anyways, this really isn't a big deal for me.
As usual, M's perspective has changed. Being the ever-evolving character of the story, I see no reason why his way of seeing the world wouldn't change, given the amount of crap he lives through. He's still crass and unpredictable, so don't worry, the humor is still there! Eventually, he'll settle into a certain manner of speaking and thinking, but he's still young....sort of.
On a side note, because of an upcoming character, I am probably adding yet another book to this series. It'll be a sidestory like "Hitori" is, but it will again tie back into the main storyline. I won't even begin the writing of this idea until this current chunk of story is complete, which will end up being 3 or 4 books, maybe more.
I'm starting to wonder where this series will end. What was 1 book, became 3, and now its at least 10. I suppose as long as the ideas keep coming and they aren't completely stupid, I'll keep going. It's a huge world I'm creating, might as well play in it as long as I can.