New York Times BestsellerYu-ning thinks her perfect life on Rainbow Island will never end—until a nasty dragon called the Obsidigon returns from beyond the grave. Now her beloved island is in flames, her best friend has been kidnapped, and the island’s Sacred Crystals have been stolen. To make matters worse, she must venture into the dark corners of the world to uncover secrets best ignored, find a weapon thought long destroyed, and recapture seven sacred...