Grade 4-8–Each of these titles provides a comprehensive, yet easy-to-read overview in large, bold print. Explanations are concise and clear without being oversimplified, and the arrangement is attractive. Diagrams, drawings, and photographs appear on every page and complement the text well. Supplemental information is offered in boxed areas. Each volume covers an element's history; where it is found; how it is extracted, purified, and used; and its chemical reactions. Arsenic includes topics such as the element's use as a poison and its industrial applications. Cobalt discusses the use of the material as a coloring agent, as well as its role in human health. Lithium describes the chemical's importance in batteries and in pharmaceuticals.