The Riddler (Edward Nigma) is a fictional supervillain appearing in American comic books published by DC Comics, commonly as an adversary of the superhero Batman. Created by writer Bill Finger and artist Dick Sprang, the character first appeared in Detective Comics #140 (Oct. 1948). The Riddler takes delight in incorporating riddles and puzzles into his criminal plots, often leaving them as clues for the authorities and Batman to solve. The character is one of Batman's most enduring enemies and belongs to the collective of adversaries that make up Batman's rogues gallery.