All of Andy Grove's books are business classics. I'm actually a little bummed that I didn't run into him sooner. "Only the Paranoid Survive" is Andy's explanation for how to handle when the business environment changes in a non-trivial way (he uses the term 10X... which probably explains SV's obsession with the concept). Though I think this book is a little less tangible than "High Output Management." On the flip side it has been keeping me on my toes for how to analyze risk and how to funnel unexpected changes into opportunities. Solid book all around.