The Stolen Guardian (The Zyearth Chronicles)

On the southern tip of the Yelar Peninsula, towering over the beach cliffs of the Desi Sea, lies the Defender Academy, the highly advanced military complex of the country of Zedric. Near the top of the ranks is Izzy Gildspine, Golden Guardian of the Zyearth Defenders. Izzy's not sure she deserves her title. Her healing powers are strong, though they're nothing compared to the elemental powers of her partner, Matt Azure. But she can't let her doubts get in the way of her job. The Defenders hold up the Golden Guardians as legends and she has to make sure she lives up to that expectation.However, Izzy's fears come true after a routine flight spirals into an out-of-control crash on a contaminated island campground, crawling with invincible monsters. To make matters worse, she and Matt find a friend and fellow Defender in the woods, half mad after being hounded for days by a foreign invader controlling the strange creatures.The horror becomes personal when Matt is enslaved by their foe, forcing Izzy to make a terrible choice. Should she follow her heart and save him, or perform her Golden Guardian duty and kill him? The fate of all Zyearth hangs in the balance and she must decide soon before the choice is made for her.