"Volcanoes and Earthquakes: Making and Moving Rock" by Steven M. Hoffman ex...More

"Rocks and Soil" by Steven M. Hoffman delves into the fascinating world of ...More

Gems, Crystals, and Precious Rocks by Steven M. Hoffman explores the fascin...More

"Rock Study: A Guide to Looking at Rocks" by Steven M. Hoffman invites read...More

"Weathering and Erosion: Wearing Down Rocks" by Steven M. Hoffman explores ...More

"Fossils: History in the Rocks" by Steven M. Hoffman explores the fascinati...More