The Master Key System by Charles F. Haanel

The Master Key System is the only clear, concise, comprehensive, definitive, distinctive, cogent, and scientific presentation of the Creative Power of Thought ever formulated by any one person at any one time. It is a system that teaches the ultimate principles, causes, effects, and laws that underlie all attainment and success. When you want to attain something, The Master Key System will show you how to get it.