ISBN 3784429403 hat failed the check­sum digit test.
The following 11 formally correct ISBNs were determined. Starting from these ISBNs the value 3784429403 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: German language
ISBNas­su­med er­rorCatalogs for checking
3-487-42940-32nd and 4th digits were swap­ped. amazon.co.uk amazon.com amazon.de
3-7804-2940-3fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-7834-2940-44th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
3-7843-2940-3fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-7844-0942-36th and 9th digits were swap­ped. amazon.co.uk amazon.com amazon.de
3-7844-2240-3seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-7844-2920-3eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-7844-2940-8tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-7844-2948-3ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
3-7844-3940-3sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Nigeria
ISBNas­su­med er­rorCatalogs for checking
978-44294-0-3first digit was chan­ged. amazon.co.uk amazon.com amazon.de

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