Sales Management That WorksIn this smart, practical, and research based guide, Harvard Business School professor Frank Cespedes offers essential sales strategies for a world that never stops changing. The rise of e commerce. Big data. AI. Given these trends (and many others), there's no doubt that sales is changing. But much of the current conventional wisdom is misleading and not supported by empirical data. If you, as a manager, fail to separate fact from hype, you will make