| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 88-6256-172-5 | 8862561725 |
| ISBN-13 | 978-88-6256-172-3 | 9788862561723 |
| Agency | Italy | |
| Publisher | Salani Editore | |
| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 1-4088-1059-X | 140881059X |
| ISBN-13 | 978-1-4088-1059-0 | 9781408810590 |
| Agency | English language | |
| Publishers | Bloomsbury Children's Books | |
| Bloomsbury | ||
| Bloomsbury Paperbacks | ||