I can not order a photo book of 100 pages on iPhoto. The assembly is fine but not sending.
Boot into Safe Mode, Mac OS X: Starting up in Safe Mode, and order from there. Be sure to create a PDF file of the book as described in this Apple Document, iPhoto, Aperture: Previewing an order in iPhoto or Aperture, and preview it for errors before ordering. Keep it to compare with the printed copy when it arrives.