Batgirl, Vol. 2 #1 (2008)

Redemption Road, Part 1: Square One
Now completely free of the influence of both Deathstroke and her father, David Cain, Cassandra has once again taken on the role of Batgirl. Feeling that she strayed due to a failure on his part to pay proper attention to her, Bruce has welcomed her back to his home. But not everyone is happy with this decision. Nightwing is suspicious of her activities and motives. And he may well be right. Cassandra is using the Batcave's computers to track down her absent father, planning to break her vow against killing once more.
Release Date: 2008