Philosophy

Nichomachean Ethics

Dao de Ching

Objectivism: The Philosophy of Ayn Rand (by Leonard Peikoff)

The Selfish Gene

On Friendship (or pretty much anything by Cicero)

Language

Metaphors We Live By

Nonviolent Communication

Politics

Human Action

The State in the Third Millenium

The Creature from Jekyll Island

Investing

The Intelligent Investor

Hot Commodities

Lombard Street

Nature

A Cow's Life

Reading the Forested Landscape

The Selfish Gene