I think that there is a fundamental misunderstanding at what goes into the publication of a book. The major costs that are excised in ebook is a) shipping; b) storage and c) printing. The costs of an editor, the artwork, the advertising, and distribution costs (although reduced) still exist.
The creation of the ebook costs nothing, but the creation of a published work, regardless of format, does have costs. True, there are fewer copies that need to be sold in order to break even and that is advantageous to authors, publishers and readers, but there are still costs.
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