A single EPUB3 file can be used to create an ebook for all e-readers, explained Liz Castro, tech expert and author, at the IDPF conference in New York. […] Hachette’s practice of delivering the same EPUB3 file to all its e-tailers, including Amazon, sets a precedent for the industry, said Castro. If more publishers developed a single viable ebook file, would e-reader systems converge upon a single standard for rendering that file? And in turn, make ebooks a more intelligible medium for the reader?
Source: “EPUB3: One File, Many Ebooks” by Deanna Utroske.