Even in Jess's worst nightmares, she never thought that pretty Mount St. Helens would erupt. But one day it did, Jess and two twins called Sam and Eddie went to the mountain and got caught in the eruption. Eddie and Sam were badly hurt, so Jess started waved her arms like crazy and a helicopter saw her. They were all saved. Jess is a brave girl (Her real name is actually Jessie). I recommend this book.