"A language is a dialect with an army and navy"
114 karma · joined May 2, 2009
Extracting an epub from an iPhone app is easy. First you unzip the .ipa file. Then you cd to Payload/*/book. Finally, you zip up the files to an .epub file: zip -X ~/book.epub mimetype && zip -r9DX ~/book.epub META-INF OEBPS.
mimetype must be first in the archive for validity, which you can test with EpubCheck.
I know! While we're at it, who had the brilliant idea to put image decoders in browsers? I say let QuickTime decode GIFs and PNGs.
Here's an excellent (but long) video on this topic: http://video.google.com/videoplay?docid=-7398680103951126462