Old book with some outdated advice, but it still holds mostly true. I found much of the second half useless, but that's just my opinion. I think the first few chapters had the most juice, and I was already using many of those ideas in my own life for a while now (probably because I knew of GTD as a technique before I knew of it as a philosophy).
Good follow-up to the first one, a bit windy in certain places but gets the point across in the end.
Good book on value investing but I personally found it numbers heavy and I guess nothing I didn't know before.