MAD Strikes Back — William M. Gaines

You have to hold this book sideways to read it so there you already look a bit Mad to begin with. In the 1950s America was a very conservative place so when Mad hit the newsstands of anytown USA it was like the cultural equivelant of an A-bomb going off. Mad parodied anything that moved and was freshest and most vital in the beginning of its run. The parodies remain a fresh today as they did then with hundreds of small sight gags that will take more than one rereading to find.