Wow, what an impressive list of great reads. OK, how about some classic non-fiction? Same as for fiction, classic non-fic stands the test of time and examines the human condition. One thing stands out: Somehow the non-fic actually changes history, society, and culture. It can even change attitudes towards people and things deemed "different" years ago. While it's heavy on women's and African American studies (Hey I studied sociology, history,
and education

), this is a partial list of personally favorite classic non-fiction:

The Prince
Up from Slavery
The Souls of Black Folk -- WEB Dubois
David Walker's Appeal (very early abolitionist work)
The Jungle -- Upton Sinclair
The Wealth of Nations
Silent Spring
The Feminine Mystique
Why We Can't Wait -- MLK, Jr.
Autobiography of Malcolm X
Passages - Gail Sheehy
Roots
Working (any book by Studs Terkel is a joy to read)
I Know Why the Caged Bird Sings