The Master Key System

This is a book that will not only make you "feel" good, but also "think" good. In "The Master Key System," presented as a series of twenty-four lessons, Charles Haanel discusses everything from how to feel healthy to how to become wealthy.
Using precise logic and a consistent, common-sense structure, Haanel shows us how to achieve what we most desire.
"The Master Key System" is said to have inspired Bill Gates to leave Harvard and found Microsoft.