N K · Niklas Klausen · Nikolas Klausmann · Nikolaus Klassen
HarperCollins · Oxford University Press
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Jumper | Paperback | 978-0-19-272032-0 (0-19-272032-5) | 1972 |
| Jumper | Hardcover | 978-0-19-271207-3 (0-19-271207-1) | 1963 |
| Toyon, a Dog of the North and His People | Library Binding | 978-0-06-012241-6 (0-06-012241-2) | 1950 |