Beautiful Racket
This is a very interesting case where the author claims the book is not free, provides it on a public webpage, and does not want to provide a PDF or ePub. I would gladly be willing to pay for content, but I like to do most of my reading on a kindle. I am not willing to pay for a book if the author is trying to make it as difficult as possible to view his book (but at least the fonts are beautiful).