1. Investing for beginners.
2. Humor on Investing. (Not sure still free today).
Both are Kindle versions from Amazon.com.
Why free? After reading this book, hopefully the readers will buy my
more advanced book "Complete the Art of Investing", whose Kindle version
has about 3 times the average size of books on investing.
So far, all book profits have been donated to charities. I do not know any reviewers on my books.