Best book to manage programmer/dev team?

I'm a dev myself but managing a team of programmer/dev is a different ball game. I've been doing it for sometime now but still dev is a bunch of cats, if you know what I mean.

So what are some of the best books (or learning resources) you actually read that helped you for real?

I know the usual suspect, Peopleware and I plan to buy if it's wasn't the fact that it's a bit old.