Roger Manley is an American author, photographer, curator, and filmmaker known for his work exploring the realms of outsider art, self-taught artists, and the unusual or extreme aspects of human behavior and creativity. He has published books, curated exhibitions, and directed projects that often highlight individuals and art forms that exist outside the mainstream cultural currents. Some of his works investigate the lives of visionaries, eccentrics, and individuals who create environments filled with fantastical art and objects. Manley's approach combines a documentary style with an empathetic, nonjudgmental curiosity about the diversity of human expression. His involvement in the field of outsider art has helped to broaden the recognition of self-taught artists and their contributions to the world of art and culture.