A DEADLY INVESTIGATION PUTS BATMAN'S ALLEYS AT RISK! Written by Tom Taylor, Greg Rucka, Mariko Tamaki and Others Art by Lee Garbett, Mikel Janin, Bill Sienkiewicz and Others With Asema now behind bars, former police detective turned private investigator Harvey Bullock still has questions he can't answer. When his investigation overlaps with Batman’s, the pair decide to work together. They discover a tie to a case from Harvey's rookie days...and a group willing to do anything to keep their secrets hidden. Can Batman save Harvey from this deadly new threat? Also featuring the landmark celebratory issue DETECTIVE COMICS #1100 featuring Greg Rucka, Bill Sienkiewicz, and other legendary creators. Collects DETECTIVE COMICS #1097-1100.