Today's free book is The Story of the Champions of the Round Table by Howard Pyle. For the table of contents, check at the bottom of this post below the image.
The book is available at Gutenberg, Internet Archive, Sacred Texts, Hathi, and Google Books. There is also a free Kindle ebook.
Table of Contents
The Story of Launcelot
The Book of Sir Tristram
The Story of Sir Tristram and the Lady Belle Isoult
The Story of Sir Tristram and Sir Lamorack
The Madness of Sir Tristram
The Book of Sir Percival