Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Extremely disappointing

I got this book to read during my vacation to Britain. I thought that I would kill the time on the plane and trains with a good read. I recalled that it was on the New York Times Bestseller list, and the story line seemed like it should be interesting. Unfortunately, I gave up about 3/4 of the way through. The story was boring, and the writing amateurish. The story might have been somewhat interesting had the "mystery" been something that could be solved by at least some of the readers. The subject matter, however, was so obscure that hardly anyone would know enough to possibly solve it. Rather than a national best seller, this book seemed like it should have been the type that gets rejected by publishers, and becomes a self-published book. Don't waste your time on it. I'm sorry I did.