A list of common, uncommon and various ISBN syntax problems caused mainly by misspelling:
- ISBM
- eISBN
- ISBNN
- IISBN
- "ISNN \d". Typos of ISSN or ISBN.
- "ISN \d". Most of them not ISBNs
- IABN
- "ISB \d". Many false positives but still some pages for fix
- "ISBN_". Rare
- "ISBN {{ISBN"
- 12-ISBN
- 133-ISBN
- isabn
- 13=ISBN
- 10_ISBN
- ISDBN
- "ISBN {{ISBNT"
- ISBBN
- ISBB
- ISNB
- ASBN. Very few and contains false positives