The three authors are the principals of LeadStar, one of the nation s top consulting firms specializing in corporate leadership and training. COURTNEY LYNCH is a former member of the U.S. Marine Corps; she also has a law degree from the William & Mary School of Law. ANGIE MORGAN, also a former Marine, has an MBA from the University of Michigan. SEAN LYNCH is a Yale graduate and served with the U.S. Air Force as a fighter pilot. The three of them have combined to pool their leadership insights and experience into producing Spark.