Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Hilarious!!!

This may be the funniest book I've ever read. A railroader named Casey Jones? Terrorists attacking through the rail system? An author who lost his job because he published this book through a vanity press? A series of reviews all clearly written by the same person? The book reminded me of the Ali G episode in which Ali G asks the head of the INS whether Homeland Security is afraid that terrorists will drive a bomb-laden train into the White House. A more plausible scenario than those propounded by this piece of literature