In twenty-four parts with questionnaire and glossary. A study of the creative processes of thought and how to apply them is of supreme importance to each one of us. This knowledge is the means whereby the evolution of human life on earth may be hastened and uplifted in the process. The Master Key is here given to the world as a means of tapping the great cosmic intelligence and attracting from it that which corresponds to the ambitions and aspirations of each reader. The Master Key will help you solve your problem.