No Laughing Matter (Nancy Drew Files #79) by Carolyn Keene - Vintage Paperback

Hear the one about the crooked comedy club? Nancy has. and it's no joke.

There's something funny going on down at the hot new comedy club, Over the Rainbow, and someone is laughing all the way to the bank. The club's accountant has been sent to jail for embezzlement, and Nancy is convinced he's been framed. She's gone undercover at the club, determined to catch the real crook's act.

But the pot of gold at the end of this Rainbow is buried in deceit and dirty tricks. Nancy suspects that the club is a front for an illegal operation and that she faces the toughest kind of crowd. Not only are the stakes dangerously high, but the players in the game have a very nasty sense of humor.