ISBN 9879994356 hat failed the check­sum digit test.
The following 10 formally correct ISBNs were determined. Starting from these ISBNs the value 9879994356 that you input could have resulted frome one error (error in one digit or transposition of two digits.) You can now check using the links given for the catalogs of amazon.co.uk, amazon.com and amazon.de whether any book is listed for the respective URL. To the home page
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ISBN prefix group: English language
ISBNas­su­med er­rorCatalogs for checking
1-879994-35-6first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Netherlands
ISBNas­su­med er­rorCatalogs for checking
94-7999-435-6second digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Argentina
ISBNas­su­med er­rorCatalogs for checking
987-799-435-6fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
987-9394-35-6fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
987-99443-5-6sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
987-99942-5-6eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
987-99943-5-3tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
987-99943-9-6ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
987-99963-5-6seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Hong Kong, China
ISBNas­su­med er­rorCatalogs for checking
988-99943-5-6third digit was chan­ged. amazon.co.uk amazon.com amazon.de

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