Gr 6-8-Visually appealing titles that examine microscopic life-forms. Diminutive Drifters focuses on marine phytoplankton while Extremophiles highlights different organisms that live in particularly harsh environments such as Antarctica, deserts, inside rocks, or on the Moon. Each volume defines its subject, provides background information on type or types of their respective environments, and devotes a couple of pages to the technology that makes the study of these life-forms possible. A profile of a microbiologist working in the field is included in each volume, and margin notes offer pronunciation tips. The large, colorful photographs, many of magnified images, help to clarify the information. Good resources where material on these topics is needed.-Sandra Welzenbach, Villarreal Elementary School, San Antonio, TX Copyright 2001 Cahners Business Information.