Instruct: Classify Amazon reviews into positive or negative sentiment
Query: On What Novel Was This Based??

I understand that there is no such thing as a perfect book-to-silver-screen adaptation, but the director and screenwriters could have at least let the plot be the plot. The Potter films have been incredibly successful at leaving out certain elements while keeping the basic story the same. The filmmakers in the case of Eragon simply decided to write their own story and use the character names from the book. Further, they wrote a bad story with a bad script and bad actors, with the exception of Jeremy Irons. Irons is certainly in his element as the grizzled, creepy, old war hero and is the only redeeming quality to the movie. It is a shame because the book had so much big screen potential. I almost wish the production company would scrap any plans for a sequel, wait several years, and then restart with better personnel. However, they might have to put Jeremy Irons in cryogenic storage so that he can reprise his role