This series on earth materials covers a wide range of factual information about rock, mineral, and soil classification and formation, as well as related geologic processes. The books will prove helpful but read like earth-science textbooks, covering too many sophisticated ideas within a short chunk of text. Crisp color photos and diagrams show key concepts. Bib., glos., ind. [Review covers these Rocks and Minerals titles: [cf2]Crystals, Igneous Rocks, Metamorphic Rocks, Minerals, Sedimentary Rocks[cf1], and [cf2]Soil[cf1].] (c) Copyright 2010. The Horn Book, Inc., a wholly owned subsidiary of Media Source, Inc. No redistribution permitted.