ISBN 8086818641 hat failed the check­sum digit test.
The following 11 formally correct ISBNs were determined. Starting from these ISBNs the value 8086818641 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: former Czechoslovakia
ISBNas­su­med er­rorCatalogs for checking
80-16-81864-1third digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86618-64-1fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86815-64-1seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86818-24-1eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86818-64-0tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86818-69-1ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86838-64-1sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86868-14-16th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-89818-64-1fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: former Yugoslavia
ISBNas­su­med er­rorCatalogs for checking
86-86818-64-1second digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Netherlands
ISBNas­su­med er­rorCatalogs for checking
90-8681-864-1first digit was chan­ged. amazon.co.uk amazon.com amazon.de

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