I caught it right off. I read "The Moon Is A Harsh Mistress" in junior high school, I know that acronym. 
If more junior high students read it, we may have fewer DUmmies in adulthood.
Big Dog's Reading List For Young Men and Women (books not taught in school):
*The Holy Bible
*The Federalist Papers
*The Art of War- Sun Tzu
*Meditations- Marcus Aurelius
*The Discourses of Epictetus
*The Moon is a Harsh Mistress- Robert A. Heinlein
*Starship Troopers- Robert A. Heinlein
*Atlas Shrugged- Ayn Rand
*We Were Soldiers Once...And Young- LTG(R) Hal Moore and Joseph Galloway
*The Stand (unabridged version)- Stephen King