These volumes present a mix of scientific facts about various sources of energy and discussions of the need for reducing our dependence on the diminishing supplies of environmentally unsound fossil fuels. The books oversimplify some complex concepts, but the information is well laid out and may encourage readers to seek more comprehensive volumes. Glos., ind.

OLLHOFF, Jim . Geothermal, Biomass, and Hydrogen ISBN 978-1-60453-937-0 . LC 2009029864. OLLHOFF, Jim . Nuclear Energy ISBN 978-1-60453-936-3 . LC 2009029853. OLLHOFF, Jim . Solar Power ISBN 978-1-60453-938-7 . LC 2009029933. OLLHOFF, Jim . Wind and Water ISBN 978-1-60453-939-4 . LC 2009029859. OLLHOFF, Jim . World in Crisis ISBN 978-1-60453-940-0 . LC 2009029865. ea vol: 32p. (Future Energy Series). illus. photos. reprods. glossary. index. CIP. ABDO & Daughters 2010. PLB $18.95. Gr 3-6 These books have a logical, clear format. Those that discuss types of fuel feature chapters that explain what the source is and how it is formed, how it is harvested or harnessed, positive and negative aspects of its use, and future possibilitieswhether the problems with fossil fuels will be alleviated and whether nuclear waste can be disposed of, etc. Ollhoff does not suggest that any of these questions will be easily answered; rather, he proposes that scientists must continue to pursue the matter in an earnest fashion. Future Energy is the only title to discuss global warming at any length, but none of the controversies swirling around it are mentioned. It is also the only book that includes suggested activities for children to do at home. All of the books feature clear, crisp photographs; one depicts two children ill with cancer as a result of the Chernobyl disaster. Suitable for reports.