ISBN 0781747509 hat failed the check­sum digit test.
The following 13 formally correct ISBNs were determined. Starting from these ISBNs the value 0781747509 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
0-7810-4757-95th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
0-7815-4770-95th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
0-7816-4750-9fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-7817-4050-9seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-7817-4730-9eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-7817-4750-3tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-7817-4758-9ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-7817-5750-9sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-7857-4710-94th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
0-7887-4750-9fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-9817475-0-72nd and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: [no known group prefix]
ISBNas­su­med er­rorCatalogs for checking
6781747509first digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Denmark
ISBNas­su­med er­rorCatalogs for checking
87-01-74750-91st and 3rd digits were swap­ped. amazon.co.uk amazon.com amazon.de

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