R.K. · Richard Kropf · Richard W. · W. K.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Evil and Evolution: A Theodicy: | 978-1-59244-798-5 (1-59244-798-8) | 2004 |
| The Faith of Jesus: The Jesus of History and the Stages of Faith | 978-1-59752-179-6 (1-59752-179-5) | 2006 |