Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Difficult, but all-around enjoyable

Count Dracula has married Queen Victoria, and vampirism is the hip new trend for anyone who wants to be anyone. A mysterious killer is cutting down young vampire prostitutes in the streets, and the police have received a letter claiming credit from someone who calls himself Jack the Ripper. If you enjoy classic vampire stories, mysteries, Victorian London, or just a really good story, it's worth taking a look.My only complaint is that the tangled threads of multiple viewpoint characters get confusing. There are quite a few characters to keep track of, each with their own agendas. Most of them are familiar from other works (the good Dr. Jekyll inspects a recent murder victim; when he is visited for further questioning, he's consulting with his friend Dr. Moreau), and there's a healthy appendix at the end that lists historical and fictional references by chapter, but it's still a lot to keep track of.