Young armchair adventurers will get a pleasant introduction to a few of America's national parks in these installments in the Rookie National Parks series (4 new titles). Each slim volume focuses on the variety of climates or geography within a park, its wildlife and native plants, and unusual features; a map-based problem and an identification quiz wrap things up, along with a brief visual glossary. A cartoon fox, Ranger Red Fox, provides context for the photos, and inset boxes offer additional facts. Joshua Tree highlights the rare tree the park is named for; the various groups of people who lived in the area, including Native Americans, ranchers, and miners; and the rocky, desert landscape. The eye-catching full-color photos and inviting, brief sentences give this easy, accessible appeal for beginning readers, and the broad scope of information, though not comprehensive, should lead young readers down interesting paths, perhaps literally.