From
The Batman Chronicles #3: "Riddle of the Jinxed Sphinx". A criminally underrated little Riddler tale, if I do say so myself. I find the art (a rather interesting collaboration between Bill Sienkiewicz and Brian Stelfreeze) to be rather hit-and-miss, but goddamn it all if Doug Moench didn't write one of the best Eddie portrayals ever.
The general plot: Riddler decides to do away with his riddles once and for all, and begins to hire himself out as a generic mastermind to various crime bosses in Gotham. Mind you, this doesn't mean that he totally abstains from riddles - just that he won't send them to law enforcement anymore. Like the Eddie we all know and love, he still performs his crimes with that overly complex supervillain flair.
( Nice diner you got here... shame if something happened to it... )