Booster Gold #5

  "52 Pick-Up" continues! Booster Gold has been tasked with preventing the origins of the world's greatest heroes from unraveling. Next up is his greatest challenge yet: preventing one of the most horrific wrongs that's ever befallen a hero in the DC Universe.
    Leaping into the pages of BATMAN: THE KILLING JOKE,
Booster attempts to stop a tragedy that he discovers never should've happened - the Joker shooting and paralyzing
Barbara Gordon, Batgirl.
    Plus, what dark secret is Rip Hunter keeping from Booster?