Orison Swett Marden (January 16, 1850 – October 24, 1924) was an American author, editor, self-improvement enthusiast and publisher. He wrote a series of books and essays focussing on personal development and spiritual growth. He believed in the power of attitude, enthusiasm and hard work to achieve success and popularity of his works made Marden one of the first best-selling authors in the self-help genre.

Orison Swett Marden (January 16, 1850 – October 24, 1924) was an American author, editor, self-improvement enthusiast and publisher. He wrote a series of books and essays focussing on personal development and spiritual growth. He believed in the power of attitude, enthusiasm and hard work to achieve success and popularity of his works made Marden one of the first best-selling authors in the self-help genre.