Charles Haanel 
The Master Key System 

The book describes many New Thought beliefs such as the law of attraction, creative visualization and man's unity with God, and teaches the importance of truth, harmonious thinking and the ability to concentrate. Each of the 24 chapters contains an introduction, followed by a sequentially numbered section which includes an exercise towards the end, followed by a section with questions and answers. At the beginning of the book is a Psychological Chart which readers are encouraged to complete, providing a self-evaluation of their creative power, time efficiency, health, mental ability and capacity to concentrate.