Instruct: Classify Amazon reviews into positive or negative sentiment
Query: More useful stuff than I had expected

Though there are only 100 words, the book is 255 pages and has a lot of good and fun exercises. My daughers grasped meanings of words from this book more solidly than some other books. I am an immigrant and I often find it's difficult to give a few good examples of the use of a new word. This book saves me the trouble.