It appears you have some minor damager to your library. Try the following:
1 - launch iPhoto with the Command+Option keys held down and repair the library.
2 - Run Option #1, Repair Permissions, followed by Option #4.
Before you place an order check the book according to this Apple document: iPhoto, Aperture: Previewing an order in iPhoto or Aperture. After checking for errors, typos and missing photos or text, you can place the order. Save the PDF file to compare with the printed copy when it arrives.
While in the book project, try going in to a single page view and back out again. Do the images now appear in either of those states?
Also, have you tried creating a PDF proof of the book? You can do this by selecting the book project, going to the File menu and selecting Print. When the print dialogue box appears, click on PDF in the bottom left hand corner. This will create and save a PDF version of your book, which is whate gets sent to Apple to create your book. If there are no images there, you likely have to start the project again.