| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Natural History of Religious Feeling: A Question of Miracles in the Soul | 978-1-112-16263-3 (1-112-16263-1) | 2009 |
| The Relation of Religion to Civil Government in the United States of America: A State Without a Church, But Not Without a Religion | 978-1-112-16347-0 (1-112-16347-6) | 2009 |