Batman: One Bad Day Series by Tom King

The Most Dangerous Game of Wits Batman and Riddler have ever played...The Riddler is one of Batman's most intellectual villains and the one who lays out his clues the most deliberately. The Riddler is always playing a game, there are always rules. But what happens when The Riddler kills someone in broad daylight for seemingly no reason? No game to play. No cypher to breakdown. Batman will reach his wit's end trying to figure out the Riddler's true motivation in this incredible thriller!