Mr. Buckingham, who spent two decades as a senior researcher at the Gallup Organization, has written a string of best-selling books. They include: First, Break All the Rules (coauthored with Curt Coffman), Now, Discover Your Strengths (coauthored with Donald O. Clifton), The One Thing You Need to Know, Go Put Your Strengths To Work, The Truth About You and Find Your Strongest Life. His latest project is the New York Times and Wall Street Journal bestseller StandOut, a book and strengths-assessment combination that uses a new research methodology to reveal people’s top two “Strength Roles,” which Mr. Buckingham defines as their “areas of comparative advantage.” In 2005, Mr. Buckingham founded The Marcus Buckingham Company, which works with managers at Toyota, Coca-Cola, Master Foods, Wells Fargo, Microsoft, Disney and other organizations to find their strengths and sustain long-lasting personal success.