So you're an author, and your book is out there in the world. You've sweated and agonized and copy edited and re-read; in short, you've done everything you could to make sure your book is the best thing you can write at that moment. You wait nervously for its release. Will it sell? Will people like it? And then the reviews start to appear. Maybe it's a positive review (yeah!); maybe it's negative (ouch!), but the reviewer takes the time to explain what it is they didn't like about the book in a clear and fair way (still ouch, but okay, I get it, no book is for everyone).