Quote:
Originally Posted by Billi
Alex, using ISBN numbers is not mandatory at all, but it is more than advised. It is the unique identifyer of a book and helps working together with booksellers, libraries, universities, wholesalers and distributors.
Yes, it is best practice to have different ISBNs for the paperback and ebook versions.
Maybe these sites help you to get a better insight (and answer the "says who?"):
http://www.isbn-international.org/ and http://www.isbn.org/standards/home/index.html |
Thanks, Billi, and Neil. The references you provided, Billi, are very useful.
But still, so far as I can tell it is best practice to use different ISBNs for print book and ebook, but not obligatory. The reason I asked the question was that two different authors have asked me to use the ISBN of their print books when I prepared the ebook version for them. So far as I can tell they are being unwise but not being naughty.
Regards, Alex