Once you really, truly understand the Fundamental Theorum, you've got what you need out of TOP. Now, that's a tall order, for sure. (Like Flop, rereading TOP occasionally is +EV, but a lot of it I'd already absorbed from playing and reading forums when I got around to really getting into TOP.)
Harrington did more for me than any book I ever read, both 1 and 2. Maybe because I'd read everything I could and played a half million hands and a couple thousand SNGs before I read it. You think?
Harrington crystallized a lot of my knowledge and my game made a large jump after reading it. (I might go for a discussion of these two books, however.)
Believe it or not, Erik Lindgren's book Making the Final Table also is a good read. He plays opposite of Harrington. Super LAG. There is a lot in that book that surprised me, despite what I've read in several reviews criticizing it. And The Little Green Book by Phil Gordon is excellent, too.
I don't think doing a chapter by chapter analysis of TOP will make you an SNG expert. I really don't think that becoming an expert in TOP would make you even a decent SNG player, as there is far more to playing tournaments than cash games, as far as being a consistent winner. If you had the patience, you could win a lot of money on a ring table by pushing AA all in and playing no other hands. There are enough idiots out there who'd call it. That wouldn't work too well in SNGs.
Frankly, I don't even know how one becomes an expert SNG player, as I'm not one and don't know if I've ever met one. I'm pretty good, but I've played a few, too, and worked very hard on improving.
What's the minimum qualifications of expert play, guys?
"Are the players better as the stakes go up? It's not an exam; it's a buyin." Barry Tanenbaum