I have been working in iBooks Author and finding it fairly good for basic tasks. However, the moment you want a bit extra from the program, it does fall short. Then again, the ePub 2 format also falls short in numerous areas. The ".iba" (iBooks) and ".epub" formats are nothing more than standard compressed "zip" files containing various folders and files of HTML, images, fonts, and more. The structures are well documented, but not simple to edit and update without a good tool. Let me acknowledge that some of the "problems" I experience with ePub/iBook formats are limitations that will require some re-imagining of the book format. The issues arise because eBooks in various formats are designed to allow the *reader* more control of content than the designer. The eBook concept is reader-centered, not designer centered. The reader can change orientation (portrait vs. landscape), magnification, typefaces, font sizes, and screen colors (inverse, ...
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