I understand, I'll just have to add a leading slash to all my images & CSS files the old fashioned way, manual editing.
There is one other option, create a folder/directory called /books and add the CSS, images. etc. into it, but that's cheating ;-) Could you see any issues with this?
Really appreciate your efforts g1smd, a week ago I didn't even know what htaccess was and that any of this was possible :-)