The Peace-Pilgrim was a woman living almost 30 years without money, in the walhalla of money: the United States. She made many walking trips and took only little on those trips. She lived just from what people gave her and she never needed any money!
Her message was about an inner peace that is reachable by anyone. You as well! It's the ultimate form of happiness, always in peace with whatever is there. Always be at peace with yourself.
"Steps Towards Inner Peace" is the book published after her death. The book is available for free. You can order it at the website about the book and there is also a digital version in Dutch and other languages.
Also check Wikipedia for more information about her life and the website Peacepilgrim.