Lace up your hiking boots, and step into the great outdoors. This breathtaking series explores six of the most spectacular national parks in the United States. Each book highlights a park's history, its most famous features, the plants and animals that live there, and conservation efforts. Short paragraphs provide easy-to-read text, while vivid photographs make each book engaging and accessible. Each book also includes informative sidebars, two "Natural Wonder" special features, a park map, comprehension questions, a glossary, an index, and a list of resources for further reading. These books are part of the Apex Honors imprint, which has a reading level of grades 3-4. However, the imprint is specifically designed for older readers, with interest levels of grades 3-9.