| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-27-1872-1 | 9542718721 |
| ISBN-13 | 978-954-27-1872-7 | 9789542718727 |
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 1-78939-148-2 | 1789391482 |
| ISBN-13 | 978-1-78939-148-0 | 9781789391480 |
| Agency | English language | |
| Publisher | Pottermore Publishing | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-27-0291-4 | 9542702914 |
| ISBN-13 | 978-954-27-0291-7 | 9789542702917 |
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||