Charles F. Haanel
Charles Francis Haanel was an American businessman and New Thought author, best known for "The Master Key System" (1912).
The book, a course in mental development and success, sold over 200,000 copies worldwide by 1933.
Haanel wrote several other books on similar topics.
His work influenced Napoleon Hill and was referenced in Rhonda Byrne's "The Secret." Haanel's system focused on concentration, attraction, and harmonious thinking.
He practiced his financial principles, achieving success as president of multiple companies.
The Master Key System's unique feature is its progressive exercises accompanying each chapter, forming a comprehensive system for personal growth.
