The Association of American Publishers have produced a letter in support of the IDPF‘s EPUB standard. There are so many things wrong with this approach that it is hard to know where to start. This quotation is representative of the substance of the letter:
… Keep Reading….For books with text that can be reflowed, many publishers would like to create and deliver to retailers and/or wholesalers EPUB files. If a proprietary e-book format is then needed, it is expected that the