For those who have this book on your wishlist, the copy of this paperback book that Walmart is selling has a different ISBN.   Mariah Stewart says on her website that this book is Walmart's September Read-of-the-Month and has additional material in the epilogue. 

The Walmart book's ISBN is:    9780345520692     In fact, there was already one copy in the system available to be ordered when I checked last.

I bought my copy from Walmart and when I posted it to my TBR, I thought it very odd that it didn't have a "W" beside the title which would indicate that this popular third book in the series was on someone's wishlist.  All of the hundred or so wishers are wishing for the other ISBN.

Jan

make sure when you look up the book that you don't uses spaces in the numbers.

Absolutely right, Paige.  I used the dashes in the ISBN number here in this forum to make the ISBN easier to read.

It's easier to copy/past them into the search bar without the spaces.