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Gr 6-9 Patent's passion for her topic is clearly expressed in an accessible writing style. However, the organization is confusing, and transitions are lacking. Numerous important concepts are briefly mentioned, but not defined in enough depth to have meaning for readers unfamiliar with modern social problems. For example, the replacement of native species by human-introduced ones is omitted. The book begins by defining extinction and showing how human-caused extinction differs from natural mass extinctions of the past. The following chapter on diversity combines descriptions of threatened animals with concepts of interrelationships within ecosystems, examples of wild species t...Log In or Sign Up to Read More