Brian Knight 
The Phoenix Girls, Book 2 [EPUB ebook] 
The Crimson Brand

The Phoenix Girls return to Aurora Hollow to learn more powerful, more difficult magic. Their strange companion and teacher, Ronan, increasingly demands more of them, even as he tracks down dangerous magical relics to close doors on trouble before it ravages Dogwood. But closed doors never remain closed. Ready or not, the girls must defend Aurora Hollow and themselves. New friends, new enemies, and new monsters join the mystical mayhem as an old threat returns to Dogwood with a new goal: to destroy the Phoenix Girls.