| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Faust Without Mephistopheles: The Historical Background of Oswald Spengler's Philosophy of Science | 978-1-6967-9669-9 (1-6967-9669-5) | 2019 |
| Faust Without Mephistopheles: The Historical Background of Oswald Spengler's Philosophy of Science | 978-1-7980-8743-5 (1-7980-8743-X) | 2019 |