Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Would have made a great novel....

Foucault's Pendulum is a fantastic book, a great novel, and where this book falls down is that it was written as non-fiction. The story in this book is fascinating, but its claims as non-fiction open the authors to ridicule, whereas if they had told their story as the fiction that it is it might have made for a much more intriguing book with the opportunity to develop some of the 'what-ifs' of their story. A missed opportunity, as it predates Foucault's Pendulum.