In the animated movie, Madagascar, there's a scene where the villainous 'Foosa' are attacking the lemurs, and things get crazy, and someone starts shouting, "It's a Good Book!" before they are shushed (Look for 'good book' in the script here: http://www.script-o-rama.com/movie_scripts/m/madagascar-script-transcript.html)
What is "it's a good book" referring to? What is the joke?
I seem to recall originally encountering a similar joke in Mad Magazine 20+ years ago, but I didn't get it then either.
Is there some movie or show or play where during some apocalyptic scene, someone is yelling 'it's a good book', possibly in reference to the bible?
Update: apparently they are actually yelling 'it's a cookbook' - the script-o-rama script was in error (as was my recollection).