You have the option to purchase the books described on the Home Page from amazon.com. Now, however, as an alternative, content is available directly on the website as well.
If you are moved to donate in return for value received – the sum of a lifetime’s search, sacrifice and hard work — that would be great!
If you can’t afford to donate, I understand. I’ve been there. I trust you to pay what you gain forward when and as you can.