The cataclysmic events of DC UNIVERSE- REBIRTH #1 continue here! The Dark Knight and the Fastest Man Alive, the two greatest detectives on any world, unite to explore the mystery behind a certain blood-stained smiley button embedded in the Batcave wall. What starts as a simple investigation turns deadly when the secrets of the button prove irresistible to an unwelcome third party-and it's not who anyone suspects! It's a mystery woven through time, and the ticking clock starts here!Written by breakout stars Tom King and Joshua Willamson, with art by Jason Fabok (JUSTICE LEAGUE) and Howard Porter (SUPERMAN), this crossover is one of the most-talked about events in all of comics. This deluxe edition graphic novel features a lenticular cover and collects BATMAN #21-22 and THE FLASH #21-22.