Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book never existed!

It is interesting that you can write such a negative review of a book that never existed. It is one of the great shames of my career that I promised to write this book but a new job and other projects pulled me away. I feel terrible that I let down the friend of mine who set up the deal.The bottom line is that the book was never written, it never existed, and your reviewing it is just foolish. However, I do agree that no one should buy it.