William Gladstone has dedicated his writing, film production, and agent efforts to creating works which directly enhance the quality of life for others. Most recently, he co-authored the new book Tapping the Source with Richard Greninger and John Selby, and is also author of the international bestselling novel The Twelve. In 1982, Bill founded the literary agency Waterside Productions and today personally represents such authors as spiritual teachers Eckhart Tolle and Neale Donald Walsch, radio talk show host Tom Hartmann, international peace advocate Dr. Ervin Laszlo, philanthropist Shari Arison, novelist Victor Villasenor, environmental activist Hunter Lovins, Chicken Soup for the Soul book series creator Mark Victor Hansen, and many others. A graduate of Yale College and Harvard University, he has traveled the world as a cultural anthropologist and researcher for such films as In Search of Ancient Mysteries. He lives in Cardiff-by-the-Sea, California.