Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Classic!

A great novel in the zombie/vampire genre, with a solitude-induced dystopia akin to Matheson's I Am Legend and Brook's World War Z.Some may see the sci-fi concepts as far fetched, specifically the triffids themselves, but the overall story congeals well bringing about stressful situations and sparking philosophical questions regarding morality, social convention, principles, and what would be the appropriate type of organization in the chaotic aftermath of pandemic blindness.