Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I have purchased better

I didn't find this book to be what I was looking for. I wanted something easy to read for a quick brush-up on basic grammar and punctuation skills. Instead I found quite a few technical terms that I don't know off the top of my head. It made the contents confusing and ultimately I put the book down after a few minutes. Not enjoyable or easy to read ( they do exist!). It's not to say the writers aren't knowledgeable, they are, but too much so. Try something else if you're looking to brush up on your skills.