It's now up to me to read the book from beginning to end. This is my last opportunity to find any minor errors and get them corrected before the book goes to print.
I find it a great deal easier to spot mistakes on the printed page than I do on a screen, so I've printed off a copy of the PDF. All 684 pages of it. The stack of paper you see here is one copy of the book. Although I've printed copies of individual sections while I was writing the book, this is the first time I've had a physical copy of the entire thing. It somehow feels more 'real' to me now than ever before.
Time to get to work on those corrections...