8 books • 4 series
Rocks, Minerals, Gems, Fossils, and Crystals
Identifying Rocks and Minerals (Identifying Guide)
Earthquakes and Volcanoes (Repairing the Damage S.)
Volcanoes and Eathquakes
Temperate Forests (Our World (Silver Burdett))
Volcanoes and Earthquakes (Houghton Mifflin Leveled Library: Our World)
Earthshock
Earth Shock