Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Plenty of practical advice

This is one book I would recommend to those who are looking for specific, practical advice on how to communicate more effectively. The topics are wide enough to encompass the typical environment an executive (not just a CEO) navigates -- from leading meetings to presenting, to making speeches and to speaking to the press. Sure, no one comes out a better speaker just by reading about it, because effective communication, like any skill, requires practice. But the book will give you enough actionable suggestions to start the journey.