The Master Key System by Charles Haanel is the seminal work that was the inspiration for other greats who followed like Napoleon Hill and also in the public domain   https://archive.org/details/charles-haanel-master-key

Understanding how to direct the power of our mind and collective consciousness will roll deeply through you after reading just a few of its lines. One of my favorite sentences from it is “life is an unfoldment not an accretion.” Enjoy 
https://m.primal.net/KrhJ.jpg