Instruct: Classify a review into positive or negative sentiment.
Query: OK reference book

While this has more films than the other guides, and often some great trivia about them, Maltin's guide has an almost useless index (missing many stars--Dean Martin, for example). In addition, he often shows his lack of knowledge outside of the world of cinema (read his review of Mary Shelley's Frankenstein & laugh politely at his ignorance). Otherwise, this is a handy little tool for the film enthusiast.