Philosophers
- The Confessions
- The Confessions
- Chocolate and Chess. Unlocking Lakatos
- Chocolate and Chess. Unlocking Lakatos
- Karl Marx: A Nineteenth-Century Life
- Karl Marx: A Nineteenth-Century Life
- Wm & H'ry: Literature, Love, and the Letters between Wiliam and Henry James (Muse Books)
- Wm & H'ry: Literature, Love, and the Letters between Wiliam and Henry James (Muse Books)
- Hitler's Philosophers
- Hitler's Philosophers
- There is a River: The Story of Edgar Cayce
- There is a River: The Story of Edgar Cayce
- The Great Philosophers
- The Great Philosophers
- Percy Bysshe Shelley as a Philosopher and Reformer
- Percy Bysshe Shelley as a Philosopher and Reformer
- Karl Marx: A Nineteenth-Century Life
- Karl Marx: A Nineteenth-Century Life
- Living Biographies of Great Philosophers
- Living Biographies of Great Philosophers
- And Time Rolls on
- And Time Rolls on
- Dirty Electricity: Electrification and the Diseases of Civilization
- Dirty Electricity: Electrification and the Diseases of Civilization
- Adam Smith: A Moral Philosopher and His Political Economy (Great Thinkers in Economics)
- Adam Smith: A Moral Philosopher and His Political Economy (Great Thinkers in Economics)
- In Search of the Good: A Life in Bioethics (Basic Bioethics)
- In Search of the Good: A Life in Bioethics (Basic Bioethics)
- Aquinas: A Guide for the Perplexed (Guides for the Perplexed)
- Aquinas: A Guide for the Perplexed (Guides for the Perplexed)