Thread: PRS-T1 Changing from original font
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Old 11-22-2011, 08:45 AM   #8
chrisridd
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Quote:
Originally Posted by seabee View Post
There's really nothing magical at all in EPUB, a valid EPUB stay valid if you only change its CSSs, they are only a zip archive of cross-referencing (files must keep their name and sub-directory inside the ZIP/EPUB) text files (optionally binary files for fonts, and for xhtml content when DRMed).
Yes and no. There are rules that have to be followed such as the mimetype file having to be first, and the pathnames all having to be UTF-8 encoded Unix paths. If you break those your book might not work any more.

It is pretty easy to follow the rules once you know about them.
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