This book stands out among other books that cover the topic of community ecology. Comparing rivers in South America and North America with ponds in Europe, it integrates many concepts into one unifying theme: river communities. . . . [U]se this book as a supplement to lessons covering food chains/food webs, life cycles, or even biomes. Reading level is appropriate for the intended audience (grades 2–5). The book would be a smart addition to a classroom library for use in a community ecology unit.