Join us as we tell you the story of the return of wolves -- especially Wolf 7 and Wolf 9 -- who came back to Yellowstone National Park after the 1973 decision under the Endangered Species Act to revitalize the park's ecosytem. Wolves in the park had been killed off starting almost 50 years earlier, depleting it of predators who kept the park's ecosystem in balance. Aldo Leopold, a prominent conservationist, realized that this had been a mistake and promoted bringing back the wolves, includign Wolf and Wolf 9, the "Matriarchs of Yellowstone National Park." This full-color, illustrated book includes a science section, photos, and facts about wolves. It was developed in conjunction with Yellowstone Forever, whose mission is to protect, preserve, and enhance Yellowstone National Park through education and philanthropy. Wolf Matriarchs of Yellowstone is part of the Green Kids Club¿ Environmental Heroes Series about animals and their survival. The text of this book is rendered in Noah Text®, a proprietary evidenced-based method of presenting text. Noah Text® highlights critical word patterns to help struggling readers, striving readers, those with dyslexia, and English language-learners read with increased fluency, accuracy, and stamina.