| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 3-86717-169-6 | 3867171696 |
| ISBN-13 | 978-3-86717-169-4 | 9783867171694 |
| Agency | German language | |
| Publisher | Der Hoerverlag DHV | |
| not well-formed | |||||||||
| valid hyphenation | |||||||||
| The check-digit is not correct. If the rest of the ISBN is correct (and it may not be), the check digit should be: 1. | |||||||||
| Correcting check-digit gives: 978-3-86717-087-1 which appears to be valid. The governing agency is: German language. | |||||||||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 3-86717-660-4 | 3867176604 |
| ISBN-13 | 978-3-86717-660-6 | 9783867176606 |
| Agency | German language | |
| Publisher | Der Hoerverlag DHV | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 3-86717-665-5 | 3867176655 |
| ISBN-13 | 978-3-86717-665-1 | 9783867176651 |
| Agency | German language | |
| Publisher | Der Hoerverlag DHV | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 1-78110-802-1 | 1781108021 |
| ISBN-13 | 978-1-78110-802-4 | 9781781108024 |
| Agency | English language | |
| Publisher | Pottermore Publishing | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 3-8445-3718-X | 384453718X |
| ISBN-13 | 978-3-8445-3718-5 | 9783844537185 |
| Agency | German language | |
| Publisher | Der Hoerverlag DHV | |