Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A good view on the sewer buikding in London

Anne Perry chooses one theme to explore in the books I read by her; Dark Assassin, shows the life of the workers in the bed of the Thames, all the various tasks done by poor children and poor men in the way of earning one's living. the novel being an entertaining detective story , she gives pace and speed elegantly to the plot of a realistic novel dealing with the building of the new sewers in London in Victorian times. Both genres mix quite well and result in a well written book quite pleasant to read