It’s been a decade since I read Christopher Buckley’s Thank You for Smoking. I remember it as slight but laugh-out-loud funny, one of the few books I did not hesitate to recommend to anybody.
The movie adaptation, written and directed by Jason Reitman, didn’t make me laugh out loud, but I was surprised at its modest depth — and the sources of that richness.

That's Just Nitpicking, Isn't It?