well-formed | ||
no hyphens provided | ||
ISBN-10 | 1-78110-987-7 | 1781109877 |
ISBN-13 | 978-1-78110-987-8 | 9781781109878 |
Agency | English language | |
Publisher | Pottermore Publishing |
well-formed | ||
valid hyphenation | ||
ISBN-10 | 977-14-3300-8 | 9771433008 |
ISBN-13 | 978-977-14-3300-2 | 9789771433002 |
Agency | Egypt | |
Publisher | Nahdet Misr |
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: 8 |
well-formed | ||
no hyphens provided | ||
ISBN-10 | 1-78110-762-9 | 1781107629 |
ISBN-13 | 978-1-78110-762-1 | 9781781107621 |
Agency | English language | |
Publisher | Pottermore Publishing |