Booklist Review

When the Wolves Returned: Restoring Nature's Balance in Yellowstone.
"Hunted to extinction by 1926, Yellowstone’s wolves have made a dramatic comeback thanks to human intervention, and their increasing numbers have restored essential balance to the park’s ecology. In a familiar, photo-essay format, veteran science writer Patent gives a concise history of these essential predators, effectively using precise examples of the wolf’s place in the natural order to show the profound interconnections of life in Yellowstone and the devastation that the absence of a single species can cause. Contributed by a father-and-daughter team, the many crisp, exciting color photos will easily draw readers into the fascinating story of natural survival and balance, while the multilevel text (short, simple sentences in framed boxes and longer, more complex sentences in paragraphs) widens the book’s audience. A final, illustrated page, entitled “The Wolf Effect,” encourages kids to review the links among Yellowstone’s fauna and flora. A great choice for elementary units about science and environmental protection."

Kirkus Review

*The original mission of Yellowstone, the world’s first national park, was people’s enjoyment of its geologic wonders. Unaware of the intricate balance of nature, the U.S. government supported the extermination of wolves there, and by 1926 they were all gone. In this account, a profusion of wildlife photographs, most by the Hartmans, illustrates the resulting changes in the ecosystem and the return to balance since wolves were reintroduced the 1990s. Supporting the historical background are black-and-white National Park Service images. The narrative proceeds on two levels, a simple boxed text on the left-hand page suitable for reading aloud with more detail in a paragraph on the right. The description of the welcome restoration of equilibrium is reinforced by a double-page spread at the end of the book asking readers to recall the wolf effect on each living thing pictured. Pair this with Jean Craighead George’s The Wolves are Back for contrasting but equally effective approaches to this piece of ecological good news.””