The Goblin's Curse: The Scions of Shadow Trilogy, Book 3 (The Faire Folk Saga)

With the help of her elven friends, Keelie Heartwood should be able to heal the cursed tree she planted at the High Mountain Renaissance Faire. But rumors of a gathering goblin army make the elves question her loyalty. And when Keelie loses an important book of magic in a peculiar fire, the elves—including her boyfriend Sean—turn against her. Ultimately, it’s up to Keelie and a motley group of humans, dragons, and fae to save the faire from the most dangerous enemy of all.