Instruct: Classify a given review into positive or negative sentiment.
Query: Inability to purchase book on kindle in the U.S.

I was very disappointed to learn that this book was not available for purchase on the Kindle in the United States. This was one of two books that I needed for a course at the University. However, this book was the only one that wasn't accessible if you lived in the United States. Why this book is made available in some countries and not others is unclear to me, but I hope that the publisher will expedite what ever it takes to resolve this issue so that all Kindle users may have equal access.