Outrageous Betrayal: The Dark Journey of Werner Erhard from est to Exile is a non-fiction book written by freelance journalist Steven Pressman and first published in 1993 by St. Martin's Press. The book gives an account of Werner Erhard's early life as Jack Rosenberg, his exploration of various forms of self-help techniques, and his foundation of Erhard Seminars Training "est" and later of Werner Erhard and Associates and of the est successor course, "The Forum". Pressman details the rapid financial success Erhard had with these companies, as well as controversies relating to litigation involving former participants in his courses. The work concludes by going over the impact of a March 3, 1991 60 Minutes broadcast on CBS where members of Erhard's family made allegations against him, and Erhard's decision to leave the United States.

Werner Hans Erhard is an American lecturer known for founding est. In 1985, Erhard replaced the est Training with a newly designed program, the Forum. Since 1991, the Forum has been kept up to date and offered by Landmark Education. He has written, lectured, and taught on self-improvement.