Napoleon Hill's work is based on his study of over 500 of the most successful people of his time, including Andrew Carnegie and Thomas Edison. The book outlines , including:

The original 1937 version of the book is widely considered to be in the because its copyright was not renewed in 1965. This means many educational and archival sites host it for free:

: Many Russian book retailers provide "demo" or fragment PDFs so you can read the first few chapters before buying. You can find these on sites like My-shop.ru or Kniga.biz.