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

I've read all of the Night World books, and this is a great book, but I must say, it's not L. J. Smith's best
Positive

Great book for people that need to write email. It would be nice to review the grammar rule's from time to time.
Positive

The Plug-In PET is not coming to America. The season of NT Warrior is already over, Axess is airing now. They would have brought the Plug-In to America before the Adanced PET. It wouldn't make sense to make the Advanced PET while NT Warrior is showing, then make the Plug-In while Axess is.The Plug-In is extremely rare. I have one, don't buy it. The battle system is terrible, and the battery dosn't last that long.Either buy this PET, or buy the Progress. I have both. The Progress is the best out of all...
Positive