A Guide to Illinois Nature Centers and Interpretive Trails Walter G. Zyznieuski and George S. Zyznieuski June 2002 paper, 0-8093-2430-X, $21.50t 256 pages, 56 halftones, 20 maps, 6 x 9 Illinois / Tourism   Following the success of their previous collaborations, Illinois Hiking and Backpacking Trails, Revised Edition and A Guide to Mountain Bike Trails in Illinois, Walter and George Zyznieuski offer this concise and handy resource for all outdoor enthusiasts interested in the outstanding nature centers and interpretive trails throughout Illinois. The 135 sites detailed in this illustrated guide are located in municipal and county parks, forest preserves, state parks, wildlife refuges, and the Shawnee National Forest. Sites range from the Apple River Canyon State Park in northwest Illinois to the Cache River State Natural Area in southern Illinois.   This guide will assist individuals and groups in successfully planning visits to these areas by clearly identifying trails that are fairly short and well suited for families and those nature centers that provide hands-on experiences viewing wildlife and nature exhibits and participating in a nature program or activity. Also, those trails that are accessible to families with strollers, individuals with disabilities, and the elderly are identified with symbols and described throughout the book.   Detailed descriptions of each center and trail are included along with directions, some maps and photographs, hours of operation, and contact information, including web sites, where available.   Sixty-seven nature centers and interpretive trails are featured for northern Illinois, including Chicago Botanic Garden, Spring Valley Nature Sanctuary and Volkening Heritage Farm, The Morton Arboretum, the Chicago Portage National Historic Site, and the Black Hawk State Historic Site.   For those interested in central Illinois, forty-one nature centers and trails are listed, including Kickapoo Creek Park, Chautauqua National Wildlife Refuge, Valentine Park, Salt Fork River Forest Preserve, Merwin Nature Preserve, Forest Park Nature Center and Adams Wildlife Sanctuary.   Twenty-seven nature centers and trails are described for southern Illinois. Among these are Lusk Creek Canyon, Giant City State Park, Cache River State Natural Area, Ferne Clyffe State Park, Rim Rock, and Crab Orchard National Wildlife Refuge.   Walter G. Zyznieuski has been employed with state and local governments in the environmental field for the past twenty-two years. As a past board member of Rails-to-Trails Conservancy, Illinois Chapter, he has been a part of the statewide trail planning activities.    George S. Zyznieuski pursues both career and outdoor recreational opportunities in Denver, Colorado. An avid outdoorsman, he continues to visit his home state of Illinois.     Also from Walter and George Zyznieuski . . . Illinois Hiking and Backpacking Trails Revised Edition paper, 0-8093-1752-4, $18.95t 392 pages, 15 illus.   A Guide to Mountain Bike Trails in Illinois paper, 0-8093-2145-9, $19.95t 247 pages, 49 illus.