Gr 5–8—Exploring natural and human-made energy sources, this comprehensive series examines the history, use, technology, and environmental issues associated with these resources, as well as alternatives and the outlook for the future. Enlightening without being preachy, the volumes emphasize the need for sustainable energy forms, incorporating balanced perspectives and up-to-date data to better inform readers on the advantages and disadvantages of each energy source. Sidebars such as "Rewind," "The Energy Future: You Choose," and "Fast Forward" offer in-depth analysis, specific historical examples, and ideas to stimulate critical thinking and discussion as well as current examples, facts, and statistics that enable students to come to their own conclusions. A simple hands-on activity at the end of the books helps readers understand the concepts in a more direct way. VERDICT A wealth of material makes this set a solid addition to science collections.