As an author, William Gladstone is best known for his international bestseller The Twelve. He is also the coauthor of Tapping the Source and co-producer of the film of the same name. William has an undergraduate degree from Yale University and a graduate degree in cultural anthropology from Harvard University. As a literary agent and the founder of Waterside Productions, William represents luminaries such as Eckhart Tolle, Thom Hartmann and Neale Donald Walsch.