This paperback collects two Azrael storylines: Azrael: Death's Dark Knight and Azrael: The Eighth Deadly Sin. The Azrael: Death's Dark Knight was originally published in its own comic book mini-series Azrael: Death's Dark Knight from May to July, 2009 as part of the Battle for the Cowl event. This storyline was written by Fabian Nicieza and illustrated by Frazier Irving. In this story a new Avenging Angel arrives in Gotham City. The ex-police officer Michael Lane is drafted by the Order of Purity to take on the mantle of Azrael, God's Sword of Justice.