Is there a shortcut for converting an iphoto book to ibooks author?

"Is there an easy way to convert an existing iphoto book into an ibook author format for publication without having to rebuild the entire book from scratch?"

I am the coauthor of "Adoption Detective" currently available as an ibook in the Apple Book Store. Converting into six different electronic editions, soft cover and hardcover books is time consuming. Are there any shortcuts available? http://www.adoptiondetectivejudithland.com