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

[EX Q]: This is nothing new from Gail Howard, or at all. These wheeling systems can be worked out mathematically, without paying for this book. There are also lots of websites that offer number generators and wheeling system explanations for free. If you want it all spelled out for you then buy this book, but if you are willing to do a little mathematical work check out lottery information website like [...].
[EX A]: Negative

[EX Q]: I am a complete Sudoku addict and am very disappointed with this book. The only reason I bought it was because I was desperate for more puzzles and it was the only one available at the store I was in. First of all, it costs $4.99 which to me, is way too much money when you can get a Kappa book for $1.99 which has better puzzles. Another thing that bugs me about this book is that some of the answer keys in the back don't match the corresponding puzzles. When I get to the difficult/Very Challenging ones in the back, sometimes I need a little help! But unfortunately, this book has quite a few errors in the answer section so when I've hit a dead end, it's over.I would recommend Kappa books from your local supermarket. This simply costs too much money for not mush quality.
[EX A]: Negative

[EX Q]: I found the basic idea of the book to be excellent and very true to life, however, I cannot say the same for the characters, Felicia in particular. Beyond her frustration, we are never privy to any of her emotions. What did she think of her plight? Why did she never worry that Johnny, her lover, might reject her? I feel that the author made a mistake by never writing in Felicia's viewpoint during her scenes with Mr. Hilditch. We certainly know many of his feeling and thoughts concerning Felicia, but never, never any of her thoughts about her sinister friend. ...The character of Mr. Hilditch is very well developed, unfortunately more so than the main character. I felt that too much of the book (one quarter) was devoted to Mr. Hilditch's downward spiral. It almost becomes a completely different story.As a previous reviewer mentioned, the author's practice on going back and the forth between past and present was confusing.
[EX A]:
Negative