Image Comics and ComiXology are offering a one-day half-off sale today on the digital versions of the Walking Dead graphic novels for only $4.99 each and select single issues of the comic book series from Robert Kirkman for only $.99 each.

Note, this deal is valid only for today, Sunday, October 16, 2011 until 11pm EST in North America (and at local evening times in other regions).

You can download these digital versions for your iPad, iPhone, iPod Touch, Android device, and your personal computer.

Visit ComiXology to view the sale items and make your purchases; you can also get the sale items through the ComiXology app on your mobile device.