Comixology has unveiled their summer reading program where they are giving away 20 assorted comics and graphic novels away for free. All you have to do is visit their Tumblr account to download your daily free comics. You only have 24 hours to grab it, so check back often. You obviously need a Comixology account and to download the free content you are basically “buying” it. Since its free, you don’t need to spend any money, but you are going through the shopping card system.