Damselfly by Chandra Prasad
Indian-American teenager Samantha Mishra, her best friend Mel Sharpe, and the other members of the Drake Rosemont Academy fencing team are on their way to Tokyo when their plane crashes on a jungle-choked island, so while they hope for rescue, the teens will need to use all their ingenuity to survive the jungle, the old man who is stalking them–and each other.