Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good book if you have 30 minutes to spare

This is a very small book, less than 90 pages, and it took about half an hour to read. I have to say I was confused when I got it and thought I might have ordered it in error but it really is less than 1/4" thick and doesn't really seem to be a "book". I was disappointed when I was looking forward to curling up for a long evening with a good story and I read it during the evening news.