ISBN 670735981 was input with 9 digits (one digit too few).
The ISBN 670735981 that you entered has got 9 digits, i.e. one digit is missing to make a valid ISBN. You can find information on the format of an ISBN on the home page of this site. This site has found the following 10 numerically correct ISBN out of which the ISBN that you input coule have resulted by a single error (dropping one digit). You can now check out these suggestions in the databases of the following booksellers' sites: amazon.co.uk (UK), amazon.com (USA) and amazon.de (Germany). Additional sites to search by ISBN (in this case, in catalogs of libraries) are e.g. the Library of Congress (USA) or the search gateway of the Deutsche Bibliothek. To the home page
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ISBN prefix group: English language
ISBNas­su­med er­rorCatalogs for checking
0-670-73598-1first digit was drop­ped. amazon.co.uk amazon.com amazon.de
 
ISBN prefix group: [no known group prefix]
ISBNas­su­med er­rorCatalogs for checking
6370735981second digit was drop­ped. amazon.co.uk amazon.com amazon.de
6706735981fourth digit was drop­ped. amazon.co.uk amazon.com amazon.de
6707325981sixth digit was drop­ped. amazon.co.uk amazon.com amazon.de
6707354981seven­th digit was drop­ped. amazon.co.uk amazon.com amazon.de
6707359681eighth digit was drop­ped. amazon.co.uk amazon.com amazon.de
6707359819tenth digit was drop­ped. amazon.co.uk amazon.com amazon.de
6707359851ninth digit was drop­ped. amazon.co.uk amazon.com amazon.de
6707435981fifth digit was drop­ped. amazon.co.uk amazon.com amazon.de
6780735981third digit was drop­ped. amazon.co.uk amazon.com amazon.de

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