Ta-da!
The heart is the highest rating: "I love this book so much I might cry. It's amazing! It's stupendous! Run to the nearest bookstore, order online, or pull out your e-reader and get this book right now!"
The star is in the middle: "This is a really good book. It's worth the time it takes to read it."
The arrow is the lowest rating: "This book is okay, but I'm not really a fan. There are better options out there."
What do you think? Suggestions?