Getting an iPhoto book project created on an iPhone to another device like a Mac or iPad
I've looked into this as well. As of this time (March 2014) there is no way to export an iphoto book created on an iphone or ipad other than to automatically send it in for printing with the associated cost. Hopefully they will come up with a way to export these as a pdf file the way they have done with the desktop version of iphoto.