"Cassandra Cain and Stephanie Brown team-up for the adventures you've been waiting for! Of course, under the mentorship of Barbara Gordon, the original Batgirl! With the Batgirls' damaged reputation still on the line and repairs on the Clock Tower well under way, Babs just might have finally found the key to their redemption. Meanwhile, serial killer the Hill Ripper is still on the loose! The girls receive their first major break in the case from...

"Barbara Gordon is no stranger to secrets. She's the daughter of GCPD Jim Gordon, the vigilante known as Batgirl and Oracle, the most powerful hacker on the planet, who until now has been kept completely hidden. Someone new has resurrected the Oracle mantle that Babs once controlled, and whoever is behind it is sending Batgirl on a wild chase all across Gotham City. By her side are two equally dangerous vigilantes--Dinah Lance, the rock star-turned-hero...