Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Send this guy to writers' camp!

How did this book get published? The plot is convoluted and jerky, the characters unreal and stereotypic, and the science exposition apocalyptic and arrogant. Even the premise is tired: humanity destroyed by ecological carelessness. Ho hum. Also repetitive. I only made it to the middle of the book - gave up after reading Pelligrino's fourth exposition of how dinosaur die-off preceded Alvarez's comet.