ISBN 0850040016 hat failed the check­sum digit test.
The following 12 formally correct ISBNs were determined. Starting from these ISBNs the value 0850040016 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
0-15-004001-6second digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-8400-4001-6third digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-85000-041-66th and 8th digits were swap­ped. amazon.co.uk amazon.com amazon.de
0-85004-001-9tenth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-85004-008-6ninth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-85004-011-6eighth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-85004-901-6seven­th digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-85009-001-6sixth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-85064-001-6fifth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-85204-001-6fourth digit was chan­ged. amazon.co.uk amazon.com amazon.de
0-85604-001-04th and 10th digits were swap­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: Italy
ISBNas­su­med er­rorCatalogs for checking
88-500-4001-6first digit was chan­ged. amazon.co.uk amazon.com amazon.de

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