"When Fern, Jordan, and Zack are selected for a mysterious class trip with Shackleton's fearless Dr. Adichie, they've only just begun to explore the limits of their powers. It's clear their teacher knows more than she's letting on about the kids' gifts--and the dangers they'll be facing. But when an unexpected accident separates the trio from their instructor and leaves them stranded on an uncharted island, they'll have to learn to rely on each other to survive the hostile environment and the Seekers' equally hostile rivals, the Keepers"--Amazon.com.