| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| C. S. Lewis: The shape of his faith and thought | Paperback | 978-0-06-064004-0 (0-06-064004-9) | 1976 |
| C. S. Lewis: The shape of his faith and thought | Hardcover | 978-0-06-064005-7 (0-06-064005-7) | 1976 |
| The Grammar of Faith | " | 978-0-06-064003-3 (0-06-064003-0) | 1978 |