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A New York Times best-seller! THE DARK KNIGHT AND THE HEROES IN A HALF SHELL COLLIDED IN THE COMICS CROSSOVER EVENT OF THE YEAR!New York City. The Teenage Mutant Ninja Turtles face the battle of a lifetime, fighting both the fearsome Foot Clan and their leader, the Shredder, and the alien forces of General Krang...which is exactly Krang's plan. Now a single-dimensional warp can rid him of both of his greatest rivals at once.Gotham City. From the Penguin to Killer Croc to Ra's al Ghul and beyond, the caped crime-fighter called Batman already has his hands full protecting his city. Suddenly, a new enemy emerges--the Shredder and his ninja followers, transported to Gotham and unleashed upon an unsuspecting world. Now they're on the hunt for the technology that will help them return home.