ISBN 8020410498 hat failed the check­sum digit test.
The following 13 formally correct ISBNs were determined. Starting from these ISBNs the value 8020410498 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: Indonesia
ISBNas­su­med er­rorCatalogs for checking
602-04-1049-8first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: former Czechoslovakia
ISBNas­su­med er­rorCatalogs for checking
80-204-1019-8eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-204-1049-Xtenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-204-1649-8seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-204-1849-07th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-204-8049-8sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-204-9041-86th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-208-1049-8fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-214-0049-84th and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-254-1049-8fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-504-1049-8third digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Norway
ISBNas­su­med er­rorCatalogs for checking
82-00-41049-82nd and 3rd digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Spain
ISBNas­su­med er­rorCatalogs for checking
84-204-1009-82nd and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de

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