Given the task definition and input, reply with output. Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

A number of books about substance abuse have come out since "I'm Dancing as Fast as I Can," but it still should be on the bookshelves (or Kindle) of everyone directly or indirectly involved with addiction. Gordon's straightforward description of the mental, emotional, and physical symptoms endured by a recovering addict has a powerful universality. It helps all of us understand the complex and excruciating process of recovery. - Ann Seymour, author of "I've Always Loved You"
Positive