
: Re: Publishing e-book I have created an e-book and I would like to publish it. Do I have to contact an authority so I can get the ISBN or it will be automatically assigned from the e-book
That would depend on if you are publishing the ebook yourself or going through a publisher. Sometimes a publisher provides an ISBN because they buy it in bulk. Having an ISBN is suggested to help identify your book and you can go to Bowker to obtain one.
If you plan to self publish to Amazon, known as Amazon Kindle Direct, you are not required to provide an ISBN:
If you plan to publish to Barnes and Noble, known as Nook Press, you are not required to, and it's optional:
If you go through Apple, my understanding you are not required to provide an ISBN if the title is FREE. Past experience: if the title is FREE at one point when you self publish you have to go through a lot of hurdles to attach a price to it later down the road.
Going through Kobo it is optional as well per my understanding, but I've never sold content on Kobo:
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