Unless your friend has a Mac, which I don't think she does, she would not be able to view your project as a whole thing.
That said, you can export the finished book as a QuickTIme Movie (.mov) which your friend could play on her computer as long as it has QuickTime installed. (If she has iTunes then QT is already installed)
Alternatively, if she has an iPod/iPad/iPhone you can export it as a file that those devices can read.
Hope that helps a little
My friend emailed me some photos to make a book to order from Apple. I made it. I would like her to see it before I order, but she doesn't live close by.
I did export it to iTunes - is there a way she can view that? other ideas?