When I click Buy Book this appears>our book appears to have default text that has not been edited. Printed books will not include this text. Do you want to continue? will the text I have sellected still be ok or will the book have missing text help Pleas?

Yes, you're safe to continue. That means that there are text boxes that you did not put any text into and they contain the holding text which will not be printed. That text is shown in a light grayt and is in Latin. Normally you can just put a space in the text box to replace the holding text so as not to get that warning message.

Before ordering the book proof the book according to this Apple document: iPhoto, Aperture: Previewing an order in iPhoto or Aperture. Check the pdf file for any missing text or photos and any warning indicators in the text boxes indicating that some of the text has exceeded the space allotted in the text box.

Keep the pdf file to compare with the printed copy when you reciive it.

OT

Yeah, do what Toad said. Proof your book. Then have someone else proof it. Then wait a few days and proof it again yourself.

It really annoying to spend all that time on a book and then find a mistake.

He's also correct about the error warning you're seeing.