Instruct: Classify Amazon reviews into positive or negative sentiment
Query: One of the most disappointing books I have ever read.

After reading The Name of the Rose and Foucault's Pendulum, I could barely wait to get my hands on The Island of the Day Before. However, I was sadly disappointed. Having read other books by Eco, many of the philosophical meanderings contained in the text were not unexpected. But unlike his previous works, many of the long-winded descriptions of philosophy, scientific thought and theology in this text felt out of place. Rather than contributing to the plot, as they did in Eco's previous novels, they simply served to slow down the pace of the novel and leave the reader trying to remember what the book was about in the first place.