Book excerpt: Published in cooperation with Canyonlands Natural History Association, this comprehensive and beautifully illustrated trailside reference describes more than 270 plants and animals plus geology of an area that includes nine national parks and monuments in the Southwest. A Naturalist's Guide to Canyon Country is the essential tool for exploring the northern Colorado Plateau, that vast province that encompasses eastern Utah, far western Colorado, and sections of northern Arizona and New Mexico. With this fully updated and revised guide in hand, you will gain a sympathetic understanding of the desert ecosystems that make up the region.