Just started
We Hold These Truths, by Mortimer J. Adler. Adler was a philosopher/writer who specialized in education. He wrote many books, but was best known as the editor and compiler of the 60-volume
Great Books Of The Western World.
http://en.wikipedia.org/wiki/Great_B..._Western_World
We Hold These Truths was written in 1987 for the bicentennial of the US Constitution. It's supposedly written for the layman, but it is a bit strong on the philosophical side, discussing the "ideas and ideals of the Constitution". Still, I'm having fun so far.