ISBN 8086279020 hat failed the check­sum digit test.
The following 14 formally correct ISBNs were determined. Starting from these ISBNs the value 8086279020 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: North Macedonia
ISBNas­su­med er­rorCatalogs for checking
608-6279-02-0first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: former Czechoslovakia
ISBNas­su­med er­rorCatalogs for checking
80-06-27902-0third digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-8027-902-0fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-8227-906-04th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-86239-02-0sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86270-92-07th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-86274-02-0seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86279-02-2tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86279-03-0ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86279-20-08th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-86279-82-0eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-86297-02-06th and 7th digits were swap­ped. amazon.co.uk amazon.com amazon.de
80-86679-02-0fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
80-87269-02-04th and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de

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