Tip of the Week: Convert iPhone O'Reilly Books to an ePub File

Basically follows these instructions:

1. Once you've downloaded the app, select Applications in iTunes, right-click the app that you want to extract, and select Show in Finder/Explorer. The file you want is selected automatically when the window opens.
2. Copy (that's copy, not move) the file to a different location, for example, your desktop.
3. Change the file extension of the copied file from .ipa to .zip using whatever method is most familiar to you.
4. Unzip the file using whatever archiving utility you prefer.
5. There are a few files, but the directory you are interested in should be named Payload
6. This step varies, depending on platform:
• If you are on a PC, simply go into the Payload/.app directory
• If you are on a Mac, go into the Payload directory, right-click the file within, and select Show Package Contents.
7. Again, there are lots of files and directories here, but the EPUB content is found in book/OEBPS.

Props to: Zef and O'Reilly