Instruct: Classify Amazon reviews into positive or negative sentiment
Query: John Douglas' best book yet.

I've read almost all of John Douglas' book and this is my favorite by far. Though it suffers from redundancy at points, merely repeating the same stories he's told in all of his other books, it is undoubtedly the most clearly written. I agree with some others that it reads like a textbook at points, but I actually like that aspect. I found it very easy to read, with a message less jumbled than some of his past works.