Robert Collier Robert Collier (1885-1950) was an American author known for his self-help and New Thought metaphysical books. He had a lifelong involvement in writing, editing, and research. Collier's most famous book, "The Secret of the Ages" (1926), gained signifiant popularity and sold over 300,000 copies during his lifetime. His writings focused on practical psychology, addressing topics such as abundance, desire, faith, visualization, confident action, and personal development. Even after his passing, Robert Collier Publications, Inc. continued to exist, with his widow and subsequent generations carrying on his work. Collier's books have enjoyed renewed attention due to their mention in the popular metaphysical film, "The Secret." The book's author, Rhonda Byrne, credits her daughter for introducing her to a century-old book, which provided a transformative glimpse and influenced her work. Robert Collier made significant contributions to the self-help genre and New Thought movement, offering insights and practical advice on achieving personal growth and success. His works continue to resonate with readers and inspire individuals on their paths to self-improvement. Read More Read Less