Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not worth any discounted price.

These books are okay, and would be a great help IF you could actually see anything on the teeny little photos in these very small paperback editions. If they were the full size books, 9x7 or larger, the captions of the photos would make sense. It seems some of the photos were mixed up while downsizing and some, no matter how hard you look, do not match captions. In others, understanding of course they are b/w photos, you cannot tell what the characters are doing or even what the author(s) are talking about. When they made the books for this set so small, they ruined any help they might have been. I was not impressed and won't buy any more of these sets of guides.