| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 0-439-13635-0 | 0439136350 | 
| ISBN-13 | 978-0-439-13635-8 | 9780439136358 | 
| Agency | English language | |
| Publishers | Scholastic Canada | |
| Scholastic | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 7-02-003345-8 | 7020033458 | 
| ISBN-13 | 978-7-02-003345-4 | 9787020033454 | 
| Agency | China, People's Republic | |
| Publisher | People's Literature Publishing House | |
| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 961-6018-94-9 | 9616018949 | 
| ISBN-13 | 978-961-6018-94-4 | 9789616018944 | 
| Agency | Slovenia | |
| Publisher | Založba Epta | |
| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 977-14-2373-8 | 9771423738 | 
| ISBN-13 | 978-977-14-2373-7 | 9789771423737 | 
| Agency | Egypt | |
| Publisher | Nahdet Misr | |
| not well-formed | |||||||||
| no hyphens provided | |||||||||
| The UCC prefix is malformed (should be 978 or 979). | |||||||||
| The check-digit is correct. | |||||||||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 0-7981-4083-6 | 0798140836 | 
| ISBN-13 | 978-0-7981-4083-6 | 9780798140836 | 
| Agency | English language | |
| Publisher | Human & Rousseau | |
| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 957-33-1800-8 | 9573318008 | 
| ISBN-13 | 978-957-33-1800-2 | 9789573318002 | 
| Agency | Taiwan | |
| Publisher | Crown Culture Publishing Company Ltd. | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 0-439-13636-9 | 0439136369 | 
| ISBN-13 | 978-0-439-13636-5 | 9780439136365 | 
| Agency | English language | |
| Publishers | Scholastic Canada | |
| Scholastic | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-446-557-X | 954446557X | 
| ISBN-13 | 978-954-446-557-5 | 9789544465575 | 
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 973-583-301-8 | 9735833018 | 
| ISBN-13 | 978-973-583-301-5 | 9789735833015 | 
| Agency | Romania | |
| Publishers | Egmont | |
| Egmont România | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 1-59413-002-7 | 1594130027 | 
| ISBN-13 | 978-1-59413-002-1 | 9781594130021 | 
| Agency | English language | |
| Publishers | Thorndike Press | |
| Large Print Press | ||
| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 99927-59-03-8 | 9992759038 | 
| ISBN-13 | 978-99927-59-03-5 | 9789992759035 | 
| Agency | Albania | |
| Publisher | Dituria | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 0-19-579915-1 | 0195799151 | 
| ISBN-13 | 978-0-19-579915-6 | 9780195799156 | 
| Agency | English language | |
| Publisher | Oxford University Press | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 80-00-01392-4 | 8000013924 | 
| ISBN-13 | 978-80-00-01392-3 | 9788000013923 | 
| Agency | former Czechoslovakia | |
| Publisher | albatros | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 0-439-65548-X | 043965548X | 
| ISBN-13 | 978-0-439-65548-4 | 9780439655484 | 
| Agency | English language | |
| Publishers | Scholastic Canada | |
| Scholastic | ||
| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 86-331-1817-3 | 8633118173 | 
| ISBN-13 | 978-86-331-1817-0 | 9788633118170 | 
| Agency | former Yugoslavia | |
| Publisher | Narodna Knjiga | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 81-8322-070-3 | 8183220703 | 
| ISBN-13 | 978-81-8322-070-5 | 9788183220705 | 
| Agency | India | |
| Publisher | Manjul Publishing House | |
| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 86-505-0973-8 | 8650509738 | 
| ISBN-13 | 978-86-505-0973-9 | 9788650509739 | 
| Agency | former Yugoslavia | |
| Publishers | Evro Giunti | |
| Evro Book | ||
| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 86-7470-622-3 | 8674706223 | 
| ISBN-13 | 978-86-7470-622-0 | 9788674706220 | 
| Agency | former Yugoslavia | |
| Publisher | Nova Knjiga | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 961-01-1837-2 | 9610118372 | 
| ISBN-13 | 978-961-01-1837-4 | 9789610118374 | 
| Agency | Slovenia | |
| Publisher | Mladinska knjiga | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 82-04-10812-5 | 8204108125 | 
| ISBN-13 | 978-82-04-10812-8 | 9788204108128 | 
| Agency | Norway | |
| Publisher | Damm | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 80-00-00951-X | 800000951X | 
| ISBN-13 | 978-80-00-00951-3 | 9788000009513 | 
| Agency | former Czechoslovakia | |
| Publisher | albatros | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 9985-3-1182-5 | 9985311825 | 
| ISBN-13 | 978-9985-3-1182-0 | 9789985311820 | 
| Agency | Estonia | |
| Publisher | Varrak Publishing House | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 99918-1-277-6 | 9991812776 | 
| ISBN-13 | 978-99918-1-277-9 | 9789991812779 | 
| Agency | Faroe Islands | |
| Publisher | BFL | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-27-2623-6 | 9542726236 | 
| ISBN-13 | 978-954-27-2623-4 | 9789542726234 | 
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 1-338-87894-8 | 1338878948 | 
| ISBN-13 | 978-1-338-87894-3 | 9781338878943 | 
| Agency | English language | |
| Publishers | Arthur A. Levine Books | |
| Scholastic | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 953-6450-62-3 | 9536450623 | 
| ISBN-13 | 978-953-6450-62-6 | 9789536450626 | 
| Agency | Croatia | |
| Publisher | Algoritam | |