ISBN 1568397709 hat failed the check­sum digit test.
The following 17 formally correct ISBNs were determined. Starting from these ISBNs the value 1568397709 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
1-268-39770-9second digit was chan­ged. amazon.co.uk amazon.com amazon.de
1-5483-9770-9third digit was chan­ged. amazon.co.uk amazon.com amazon.de
1-56139-770-9fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
1-56389-770-94th and 5th digits were swap­ped. amazon.co.uk amazon.com amazon.de
1-56830-779-96th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
1-56838-770-9sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
1-56839-370-9seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
1-56839-770-4tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
1-56839-773-9ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
1-56839-790-9eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
1-56839-970-77th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
1-56849-770-9fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
1-56893-770-95th and 6th digits were swap­ped. amazon.co.uk amazon.com amazon.de
1-56939-770-84th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
1-86539-770-92nd and 4th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Brazil*
ISBNas­su­med er­rorCatalogs for checking
6568397709first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Chile
ISBNas­su­med er­rorCatalogs for checking
956-8397-70-11st and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de

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