Charles F. Haanel 
The Master Key System [EPUB ebook] 
The scientific Method for creating reality with thought

This is a book that will not only make you ‚feel‘ good, but also ‚think‘ good. In ‚The Master Key, ‚ 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‘ is said to have inspired Bill Gates to leave Harvard and found Microsoft.