Q: Can't print a photobook using iPhoto for iPad

And are you currently in Australia? Is your billing address set to Australia, like your shipping address and your Apple ID, Credit card? Check your address carefully for format errors, like the zip code; does your Apple ID work at all for buying from the App Store? If not, contact Apple Support. There have previously been similar reports of problems when buying Photo Books in Australia.

                                                  Re: Unable to buy iPhoto book                                            

                                               Nothing happens after Check Out                                            

Just wondering if you got this problem sorted? I am having the same issue. Everything is set to Australia but am still getting that message re changing stores. Getting very frustrated. Thanks

Go to your account and delete and reenter all of the billing info for your credit card.  That often will fix the problem.

OT

I am getting this problem now and it is now 2016! Is there a fix for this identified?

I had exactly the same problem in August 2016. I spent a long time talking to Apple support who could not identify the problem. Then tried creating a new Apple ID (using same delivery and payment information) and was able to order the book using the new Apple ID.