David L. Van Rooy, PhD, is senior director of global organizational effectiveness at Walmart, where he is responsible for the world s largest employee engagement and performance management programs. He has also overseen the development of talent management programs for leading companies, including Burger King and Marriott International.

Walter Dixon is a broadcast media veteran of more than twenty years' experience with a background in theater and performing arts and voice work for commercials. After a career in public radio, he is now a full-time narrator with more than fifty audiobooks recorded in genres ranging from religion and politics to children's stories.