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