| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Essays On the Formation and Publication of Opinions: And On Other Subjects | 978-1-146-81402-7 (1-146-81402-X) | 2010 |
| Essays On the Pursuit of Truth: On the Progress of Knowledge, and On the Fundamental Principle of All Evidence and Expectation | 978-1-145-84734-7 (1-145-84734-X) | 2010 |