Maria Nelson 
Metamorphic Rocks [PDF ebook] 

Metamorphic rocks have a story to tell-formed from other kinds of rock, including other metamorphic rock, these rocks have been through a change in temperature, pressure, or physical stress that has made them look different. Sometimes even their whole chemical makeup is changed. Readers will be fascinated by the ways metamorphic rock can change, and a helpful graphic organizer details the process. Full-color photographs and fun fact boxes will further engage readers with science content that supports the curriculum.