The Spark

Seventeen-year-olds April and Tessa weren't supposed to be worried about anything but getting into college. Still, when a mysterious envelope pulls them into a scavenger hunt around the world, their lives become a lot more complicated. Guided by anonymous texts and riddles, the girls participate in a global chase, where every destination may be their last. As the stakes rise, so does the pressure, and even the strongest diamonds can't withstand it forever.