ISBN 8804563020 hat failed the check­sum digit test.
The following 13 formally correct ISBNs were determined. Starting from these ISBNs the value 8804563020 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
0-8045-6302-0first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Poland
ISBNas­su­med er­rorCatalogs for checking
83-04-56802-02nd and 7th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Spain
ISBNas­su­med er­rorCatalogs for checking
84-04-56302-0second digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Italy
ISBNas­su­med er­rorCatalogs for checking
88-02-56302-0fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
88-03-56402-04th and 7th digits were swap­ped. amazon.co.uk amazon.com amazon.de
88-04-06302-55th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
88-04-51302-0sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
88-04-53602-06th and 7th digits were swap­ped. amazon.co.uk amazon.com amazon.de
88-04-56032-07th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
88-04-56302-8tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
88-04-56306-0ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
88-04-56502-0seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
88-14-56302-0third digit was chan­ged. amazon.co.uk amazon.com amazon.de

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