"Secret Door to Success" by Florence Scovel Shinn is a self-help book that explores the concept of success and provides practical strategies for achieving it. The book emphasizes the power of positive thinking, affirmations, and visualization in manifesting one's desires. It delves into the idea that success is not solely determined by external factors, but also by one's mindset and beliefs. Through real-life examples and anecdotes, the author guides readers on how to overcome obstacles, tap into their inner power, and unlock the secret door to success in various aspects of life, including career, relationships, and personal growth.