My list of ten "Books That Make Us Human"

I'm writing this in Boise, Idaho (90 degrees today!), where I will be giving a talk to a group of priests midday, before heading back home in the evening. I see that the gracious and never-sleeping, ever-going, always-posting Brad Birzer (professor, historian, author, prog rock expert) has posted my list of "Books That Make Us Human" on the Imaginative Conservative blog, part of a symposium of sorts (here is a note by Brad explaining the criteria for the book choices). Here are my first three books:

1. The Bible. It is one of the first books I read (not cover-to-cover, at first, of course), and the first book I memorized passages from as a child. I cannot imagine trying to think about or comprehend the human condition without it. A few specific books within The Good Book that merit note: Genesis and Exodus, the Psalms and The Book of Wisdom, the Gospel of John, and Apostle Paul's Epistle to the Romans.

2. Confessions, by St. Augustine of Hippo. I've read it several times now, and I am always amazed by the depth of Augustine's thinking and emotions, as well as by the clarity and profundity of his expression.

3. Summa Theologica, by St. Thomas Aquinas. It would be a mistake to assume this seminal work of theology/philosophy is dry or merely didactic, because a careful and reflective reading reveals an understanding of man's origin, nature, and end that has rarely been rivaled.

Read the remaining seven. It was a tough list to narrow down to ten (and I actually list more than ten); there are many other deserving titles. What are some of your choices?