NO RIDDLES. NO CLUES. GAME ON. Tom King and Mitch Gerads, the Eisner Award-winning duo behind Mister Miracle, The Sheriff of Babylon, and Strange Adventures, reunite to dive deep into the mind of Batman's most intellectual foe...the Riddler. The Riddler has killed a man in broad daylight for seemingly no reason, but...there's always a reason. The Riddler is always playing a game; there are always rules. Batman will reach his wit's end trying to figure out the Riddler's true motivation in this epic psychological thriller. This deluxe hardcover collects the first critically acclaimed, bestselling installment of the Batman - One Bad Day series.