If it helps, here is a a concise explanation of how to get to your Iphone books and how to get a get a usable PID since I found the PIDs with $ or * don't work on my IPhone books...
1) How to get a copy of ebooks off IPhone
Backup the iphone with Itunes, then use Iphone Backup Extractor. The problem is that your books will not have recognizable names so it's a pain if you want a specific book and not all of them.
http://www.reincubate.com/labs/iphon...e/3_wizard.png
This directory in backupextractor:
2) How to get your UDID for your IPhone from ITunes
To find your iPhone's UDID, just plug it into your computer and wait until iTunes recognizes it. Select your phone from the Devices list in iTunes and click the "Summary" tab. To see your UDID, click on the word "serial number" beside the picture of the iPhone. You should see the word "identifer" and an alphanumeric string – this is your UDID. To copy it, just press command + C on your Mac's keyboard (or control + C in Windows)
3) How to get a PID from your UDID
This next step assumes you know how to use Python and have downloaded azw-0.2.zip (google to find it) and added the python files to the pythonxx\tools\scripts folder.
Use kindlepid.py to generate a PID. For example, if I type kindlepid.py 7XXXa8XXbcXXXXXXb9XXXXXXXXXXd9bXXXXXXXf01XX (my UDID xed out) I will get a PID.
Can't discuss how to strip DRM from books in the forums since it is probably illegal to remove DRM. You'll have to PM someone who knows or search the forums (that can be a nightmare of threads).