| Title / Condition | Highlights | Price |
|---|---|---|
| Principia Mathematica [Second edition] Whitehead, Alfred North ; Russell, Bertrand / Used - Hardcover | 1st Edition | $4,950.00 |
| Principia Mathematica. Second Edition Whitehead, Alfred North, and Bertrand Russell / Used - Hardcover | $500.00 | |
| Principia Ethica Moore, George Edward / Used - Hardcover | 1st Edition | $300.00 |
| Plato's Progress Ryle, Gilbert / Used - Hardcover | 1st Edition Near fine Dust Jacket | $83.00 |