I second the nomination of "Good to Great" by Jim Collins <http://www.jimcollins.com/lib/books.html>. It's the best general business book I've read. Most popular business books were written by one manager who was successful one time at one company, but often their advice isn't generally applicable. "Good to Great" is actually based on quantitative economic and sociological research across many companies and it shows compelling evidence for how certain factors often lead to success.
