I just finished the second big pass through the book. That's a big deal. The first pass muddles through an outline and figures out what should be in the book and where it should go. That's a mess. I often left To Do notes where I knew I wanted things.
The second pass went all of the book and resolved most of that. Some content disappeared, other stuff was added. Things that don't work aren't gone because I didn't want any notes about outstanding bugs or "maybe this will work when you get the book". But, at the end of this pass I have everything I want mostly in the place I want it.
The next step is the polish. That should be really quick. I want to give O'Reilly the book this month and aside from asteroid strikes and surprise dinosaurs that shouldn't be a problem. My editor has already gone through most of the book and hasn't yelled at me about anything.
If you've been waiting to read the draft until it firmed up, now's the time. Find out which parts confuse you, where I am wrong, and so on. There's not much time left.