William Gladstone founded Waterside Productions, Inc. in 1982, and has personally placed more than 5000 titles with dozens of publishers. He has represented stars of the technical world ranging from Peter Norton to Linus Torvalds and was responsible for selling the first For Dummies book, DOS for Dummies by Dan Gookin, which led to the phenomenal series which now has sold over 300 million copies.

Currently, Mr. Gladstone represents individual authors such as spiritual teachers Eckhart Tolle, Dr. Barbara DeAngelis, and Neale Donald Walsch, radio talk show host Thom Hartmann, international peace advocate Dr. Ervin Laszlo, philanthropist Shari Arison, the Napoleon Hill Foundation, New York Times bestselling authors Victor Villasenor, Gay Hendricks and John Assaraf, environmental activists Michael Tobias, Paul Ehrlich, Hunter Lovins, musician Neil Young, and many other outstanding authors and professionals dedicated to creating books which inspire and improve the world.

Mr. Gladstone is also the author of the best-selling novels The Twelve and The Power of Twelve, co-author with Jack Canfield of The Golden Motorcycle Gang as well as producer of the film Tapping the Source and co-author of the book Tapping The Source (released in paperback as The Complete Master Key System by Tarcher/Random House).