I haven't watched the video, so this question is just based on the article: does he take into account multiple sources for the same book?
For instance, when a book is still under copyright and is available on Amazon, it is usually available from one publisher. When a book is not under copyright and is available on Amazon, it is often available from several different publishers.
If one book is available from 10 publishers, will it be counted 10 times in his numbers or just once?
For instance, when a book is still under copyright and is available on Amazon, it is usually available from one publisher. When a book is not under copyright and is available on Amazon, it is often available from several different publishers.
If one book is available from 10 publishers, will it be counted 10 times in his numbers or just once?