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

Q: I've been a longtime fan of Mercedes and own most of her Valdemar series. So, of course, I picked this book up at my local store. After wrestling through 50 pages, I gave up! I plan to sell it back to my local store ASAP- this is nothing better than a paperweight in my bookshelves. The worst part is, my boyfriend picked it up and tried reading it. Now he thinks that this is a good example of her work!

A: Negative
****
Q: While old and out of print, this book is a very good way to learn the basics of photography. You have to ignore most of the references to digital cameras as the technology has changed a lot.

A: Positive
****
Q: This movie was not an original concept. The jokes were lame, as were the performances. The writer and director disappointed the audience by using Adam Sandler, Seth Rogen and Jonah Hill as a box office draw. When in fact, it wasn't worth the money to see this film in a theatre.

A:
Negative
****