To add on to the excellent advice you’ve already received, here’s my “If it were me” –
If it were me, I’d step away from that pile of 400k words for a period of time, because each of those words knows the axe is coming, and the sound of all of them clamoring to be included in the book would be too overwhelming for me to make much progress.
Instead, I would sit down with a piece of paper and a pencil, and take a stab at writing a few things:
- My goal or goals for the book
- A synopsis of the book
- A TOC for the book
- A paragraph describing what each chapter will cover and why the chapter is important to the book
I wouldn’t expect to be able to write the things above in sequence and have them be perfect right out the gate. I would expect an iterative process, in which, perhaps I consider my goal and the synopsis, then take a first pass at the TOC, then the chapter paragraphs, then tweak the synopsis, then a chapter I realized was missing, etc.
I specifically would not do this at the computer, because I’d need separation from those words. I’ve spent so much time with them already, that I’d expect to have internalized the important ideas by now. So I wouldn’t reference them. In fact, I’d try to trick my mind into forgetting that they’re there and just focus on the thing that’s important now: Defining the book I’m going to write.
Yes, it’s a very top-down approach, but I’ve already taken the bottom-up route and that left me with 400k noisy words and no book.
Once I had a reasonably complete draft of those things (synopsis, TOC, etc.), now I have a filter through which to view the words. I’d start digging through my material, specifically seeking sections of text that support the ideas that will be discussed in each chapter. The words aren’t driving the book, the structure I’ve defined on paper is.
I would need to be selective about what I pull in. In fact, I might want to focus on getting a chapter at a time drafted, so I don’t throw too many words plus the kitchen sink into each chapter and end up no better off. Or maybe I’d find that I’m disciplined enough to put in the words that belong and leave out the words that don’t. And maybe I have to write chunks of one or more chapters from scratch.
One way to look at it is that I’m not so much cutting material, as I am not including it in this particular book. Maybe I tell the words that I’m leaving out that they can go in the next book, just to keep them quiet.
Again, I would expect this to be an iterative process. As I’m writing a chapter, I may realize that it’s trying to say too much, and really needs to be two chapters. The structure defined on paper is a guideline and subject to change, if that’s what is best for the book.
Anyway, that’s something along the lines of what I’d do to bring some structure to this endeavor, if it were me.
Best of luck!
Jim