Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great origami book for intermediate folders

I looked over a lot of origami books at the bookstore, and I chose this particular one because so many people liked Montroll's books. Now I see why.All of the designs in here involve "pre-folding" where you fold and unfold a part of the paper to get a crease. Later on, as you attempt difficult folds, the creases will be there for you to make the job a lot easier. I liked that a lot.Montroll seams to be a "purist" using only a square piece of paper and no cuts. So you can see how difficult it gets to make animals such as lobsters and crabs.