Evvy and Luvo (who is the heart of a mountain) are traveling with Rosethorn while she goes to do some temple work. What at first appears to be just a problem of dying trees and poisoned water turns out to be something much works. Evvy must use all of her magic and knowledge to save her friends.
I love Tamora Pierce, and this book is no disappointment. It was originally written for and released as an audiobook, and it slightly better in that format. However, it is still fantastic. With the characteristics of Pierce's writing, it is filled with amazing characters and an interesting plot. I would recommend this book to anyone who loves fantasy and wants a good read.