"The Secret Door to Success" is a series of talks and lectures given by Shinn as she taught individuals to control conditions and release abundance through a knowledge of Spiritual Law. 

She taught that life is a game and in order to play it well, one must learn to understand the universal laws that govern it. She showed her students and readers how to win health, prosperity and happiness by mastering the game. By sharing real-life stories, she illustrates how positive attitudes and affirmations invariably succeed in making one a winner in life - able to control life's conditions and release abundance through knowledge of spiritual law.