Green Arrow/Black Canary Vol. 3: A League of Their Own — Judd Winick

Green Arrow and Black Canary finally discover the whereabouts of Green Arrow's kidnapped son - but can they save him? Teaming with a newly formed League of Assassins, Green Arrow and Black Canary - with the help of Batman and Plastic Man - discover the person responsible for Conner Hawke's disappearance. But when the perpetrator is revealed to be a major figure from Green Arrow's past, all hell breaks loose!
Plus, finding Conner was only the beginning. Now Team Arrow has to figure out what's happened to the hero they've brought home!