Maria Nelson 
Igneous Rocks [PDF ebook] 

Whether formed deep underground or created following a volcanic eruption, igneous rocks earn their nickname as "fire rocks." Readers will learn exciting facts about the many kinds of rocks that emerge from the superhot melted rock found beneath Earth’s surface. This book includes age-appropriate content that will enhance the science curriculum through fascinating fact boxes, full-color photographs, and a graphic organizer detailing the process of igneous rock formation.