Lisa Berkowitz has worked with:   Scott Adams Ken Blanchard Clay Christensen Jim Collins Michael Dell Peter Drucker Louis V. Gerstner Michael Hammer Jon Huntsman Lou Holtz Spencer Johnson Guy Kawasaki Joel Kurtzman Harvey Mackay Geoffrey Moore Faith Popcorn Mike Shanahan Don Shula Isiah Thomas Noel Tichy   Companies Berkowitz & Associates has worked with: Crown Business Currency/Doubleday HarperBusiness Harvard Business School Press John Wiley & Sons Portfolio Prentice Hall/Financial Times Running Press Simon & Schuster Swiss Consulting Group Wharton Publishing