Instruct: Classify the given review into positive or negative sentiment.
Query: Disappointed

After having read The Truth Machine, Halperin's first novel, I was more than eager to read this one. Unfortunately, Halperin wrote a book that was too similar in style to his first novel and too long in getting to the real meat of the story, thawing the main character. Halperin does provide a believable and somewhat optimistic view of the future and how we get there but this view was not enough to hold up the story.