 | |
| Author | Charles F. Haanel |
|---|---|
| Language | English |
| Subject | Personal-success Self-help Philosophy |
| Genre | Non-fiction |
| Publisher | Psychology Publishing |
Publication date | 1916 |
| Publication place | United States |
| Media type | Print (Hardcover, Paperback, E-Book) |
| Pages | 138 |
| ISBN | 978-1-61720-383-1 |
The Master Key System is a personal development book by Charles F. Haanel that was originally published as a 24-week correspondence course in 1912, and then in book form in 1916.[1] The ideas it describes and explains come mostly from New Thought philosophy. It was one of the main sources of inspiration for Rhonda Byrne's film and book The Secret (2006).
- ^ "Charles F. Haanel (1866 – 1949)". Kallisti publishing. Retrieved 6 August 2015.