If The Simpsons Movie left you wanting even more - Simpsons, that is, not doughnuts - read all about 'em.
The Gospel According to the Simpsons, Bigger and Possibly Even Better! Edition (Westminster John Knox Press) by Mark Pinsky takes a look at the show's spiritual side. They may be irreverent, but, the author says, the Simpsons go to church more than any other TV family.
The Simpsons Handbook: Secret Tips from the Pros (Harper) by Matt Groening is a guide by the show's creator to drawing its lively world, and an inside look at traditional animation.
What's Science Ever Done for Us: What the Simpsons Can Teach Us About Physics, Robots, Life and the Universe (Wiley) by Paul Halpern is a look at the show's forays into such subjects as genetics, time travel, teleportation and Homer's theory of the doughnut-shaped universe.