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ePub is an open-standard file format for digital books. The benefit of the ePub format is that it allows a book's text to adjust or "reflow" automatically to different screen sizes, including netbooks and e-reader devices. We often refer to ePub files as "flowing text". For some Google eBooks, only the PDF (scanned pages) is available and not the ePub.


Hi Richard,

This is really impressive demo.

Playing with this demo I found an usability issue. It seems to me that it is wrong that Previous/Next buttons work the same way in Page mode and in Flow mode.

In Page mode user expects to jump from one virtual page to another, as it is the case, but he also expects to be able to jump to the next or previous chapter, but there are no such buttons. To jump to other chapter user must use table of contents and that is cumbersome.

In Flow mode user wants to scroll text using scrollbar and use Previous/Next buttons to jump to previous or next chapter. But Previous/Next buttons work the same way as in Page mode, i.e. clicking on them results into jumping to other virtual page, and this is counterintuitive because user does not expect any virtual page.

The best solution would be this: in Page mode there should be two pairs of buttons: Previous Page/Next Page and Previous Chapter/Next Chapter, but in Flow mode there should be only one pair of buttons: Previous Chapter/Next Chapter.

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