For the last week or so, I've been working on incorporating the technical reviews of my digital identity book into the draft. I'm also trying to finalize it for O'Reilly. I found the best way to catch small typos (and I make a lot) is to read the draft out loud to myself. That's really time consuming. In the old days, before spell checkers, I used to read things backwards to force myself to look at each word for spelling.