Batgirl Vol. 2: Knightfall Descends

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Batgirl Barbara Gordon faces foe after foe now that she's back in the role of Batgirl. A deadly new gentleman killer, Grotesque, stalks the streets of Gotham City; The Court of Owls sets its sight on her father Commissoner Gordon; and an innocent woman sentenced to Arkham emerges more dangerous than the innmates she was locked up with!

Source: http://www.amazon.com/dp/1401238173