Instruct: Classify an Amazon review into positive or negative sentiment.
Query: not so much.

This was 'required reading' for a graduate level course in seminary. I think the author could have boiled it down to 5-6 pages of useful material rather than page after page of reiterating the same thing 3 different ways. By the time I was finished with 1/2 the book - reading the second half was more of a chore than enjoyable/edifying. I'm not an expert in the area angelology, so i'm going to search for a better read for my personal library.