Side note from the author: Posting this here as I know some folks that read Hacker News wouldn't mind saving a few bucks on my books. Not meant as spam... just

Side note from the author: Posting this here as I know some folks that read Hacker News wouldn't mind saving a few bucks on my books. Not meant as spam... just don't want anyone to miss out on saving a few bucks. Feel free to ignore if you don't like DRM free Linux books. :)