The Ultimate Question

HBR's 10 Must Reads on Marketing, Updated and Expanded (featuring "Marketing Myopia" by Theodore Levitt)

Harvard Harvard Business Review, Theodore Levitt, Fred Reichheld, Roger L. Martin, Sandra Matz

HBR's 10 Must Reads on Strategic Marketing

Harvard Harvard Business Review, Clayton M. Christensen, Theodore Levitt, Philip Kotler, Fred Reichheld

Winning on Purpose : The Unbeatable Strategy of Loving Customers

Fred Reichheld

The Ultimate Question 2.0 : How Net Promoter Companies Thrive in a Customer-Driven World

Rob Markey, Fred Reichheld