Batman - One Bad Day: The Riddler #1

Batman investigates when the Riddler abruptly kills a random person with no riddles involved. Batman soon learns that the Riddler has evolved past riddles and become a much more deadly threat by always knowing the answers to every situation he is in. In the past, Edward's father punished him for anything less than perfect grades in school, and despite his studies, Edward was thrown off when one professor would add riddles to his exams, leading to Edward's obsession to solve riddles.