William Nathaniel "Bill" Phillips is an American entrepreneur and author. He is the author of the fitness book Body for Life: 12 Weeks to Mental and Physical Strength. He is the author Eating for Life, founder and former editor in chief of Muscle Media magazine and the former CEO of EAS, a performance nutritional supplement company. Bill also made a promotional movie called Body of Work which was filmed in Las Vegas, Nevada and chronicled the very first EAS Challenge.