Unrelated to the DC thing, Boom! Studios is giving away free digital copies of Mark Waid and Mick Oosterveer's Unknown books as a tribute to Oosterveer's recent passing at the too-young age of 50. Check out the details at the links below. I read both series when they came out, and they are every bit as good as any of Waid's best work. Well worth your time.
BOOM! Studios offers late artist’s work for free | Robot 6 @ Comic Book Resources – Covering Comic Book News and Entertainment