I'd be curious to hear others' recommendations, but I've gotten a lot out of Good to Great, The Innovator's Dilemma, and Natural Capitalism. If you're starting

I'd be curious to hear others' recommendations, but I've gotten a lot out of Good to Great, The Innovator's Dilemma, and Natural Capitalism. If you're starting a startup, I'd recommend The Lean Startup over all of those, though.