Many visitors to Yellowstone National Park don't realize that the boiling hot springs and spraying geysers are caused by an underlying supervolcano, so large that the caldera can only be seen by plane or satellite. And by some scientific measurements, it could be overdue for an eruption. For Alex,...

When the California drought escalates to catastrophic proportions, one teen is forced to make life and death decisions for her family in this harrowing story of survival from New York Times bestselling author Neal Shusterman and Jarrod Shusterman. The drought--or the Tap...