Quote:
Originally Posted by ownedbycats
Separate book records for separate editions?
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Yes, they will not be the same content, unless it's just different paper sizes (which must have different ISBN).
A paper edition ISBN isn't the ebook either. An ebook doesn't need an ISBN, but if it has one it must be unique to that ebook.
ISBNs are mainly for retail physical book shops to order, and secondarily for libraries of physical books to indicate edition. A library using barcodes doesn't use the ISBN as it may have more than one copy of the same edition. The library management barcode (being replaced by RFIDs) tracks a particular copy.