[splinters]

I have published 30 books through Lulu and they have sold well through itunes. They are now for sale through the Nook store.
I am able to view on the ipad and they look great. As they are picture books i embed the text into the pictures with images making the pages. I received an email from a friend who bought my latest book and it is cropped quite badly on his nook colour. The right hand side of each page is missing.
Lulu give no guidelines for formatting for Nook and i never questioned this as they work perfectly on ipad.
Any idea what is wrong here?