Instruct: Classify Amazon reviews into positive or negative sentiment
Query: thought-provoking read

Foucault's Pendulum, by the author of The Rame of the Rose, is a wonderul read. It's filled with great descriptive passages, well-drawn characters, a non-linear storyline, and thoughts of conspiracy that would overwhelm some readers of The da Vinci Code, I suspect. The main characters are in pursuit of the long-lost secrets of the Knights Templar. Does it lead to their own un-doing? Read it and find out! Be prepared for depth, as opposed to action.