Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
I read this book over the summer because I had no time to go to a library or a bookstore and I had gotten to book for my birthday from my aunt back in May. I usually read ALL the time. If it's a good book, I can read it in less than 1 day. Sometimes it even takes me 1-2 hours. But this book took me 3 weeks. I couldn't believe how long it took me! Then it turns out that I have to read it this year in school. (UGH!) Please don't read this book, only if you love very old books that are very hard to understand.
Answer:
Negative