When book reviews go bad–or how to react when a reviewer hates your book

"Another reason to listen to harsh criticism is because you can learn from it. Try to see your book from the reviewer’s point of view. There are probably areas you can work on in your next book. Essentially, a reviewer might be providing a valuable service in helping you improve your writing and your next book."

http://selfpublishingresources.com/when-book-reviews-go-bad-or-how-to-react-when-a-reviewer-hates-your-book/