Where did you get the ebook from, it should be a simple matter (?) of downloading the book from there onto your ipod. The ebook perhaps has DRM on it, you have so far only 'registered' for it to be read on mobi reader.
You may also get answers in
The Apple Forum ?
May I offer you a warm welcome to Mobileread Forums.
Have a browse around, you may have already discovered the
Main Forum is laid out in a logical manner.
Everyone’s friendly, if you need any help, do ask around. Members with
Green names are the hard-working Moderators…(they don’t bite, just keep the rest of us safe.)
If you want a non-technical chat or three, pop into the
Lounge .
check out our
Wiki for other information ....
Please join in and enjoy your stay .....