CHB Tale Of Sorcery: Tale Of Magic #3

The thrilling third book in Chris Colfer's #1 New York Times bestselling A Tale of Magic... series 

As the doors were pushed, flames and magma spewed out from between the cracks, offering glimpses into the world of fire and chaos beyond them. 
 
Brystal Evergreen is running out of time. It has been almost one year since she made a deal with Death to find and destroy the Immortal in exchange for her life. But she still hasn't found a single clue about who or where the Immortal is. To make matters worse, something dark and malignant has risen from deep within the earth, threatening life as we know it. 
 
To stop this new evil, the fairies and witches must work with all the kingdoms and territories, including the Righteous Brotherhood and their Army of the Dead. But is the threat more familiar than they expected? And why is a secretive group of Sorcerers convinced that Xanthous Hayfield is connected to it?