The problem is not being able to see it on iPad, but layout for the book. I want to be able to see the layout and font correctly as I am designing the book, not just the preview on iPad.
I think that's unrealistic, sorry. As with apps, it is critical to test the final product in the same way the user will experience it...on a device.
I know that means owning one, but it is important to do, so if you don't have a device, do your best to find someone that does and ask them to help test for you.