Earth Treasures: The Northeastern Quadrant is the ultimate guidebook to actual locales for collecting rocks, minerals and fossils in Connecticut, Illinois, Indiana, Maine, Massachusetts, Michigan, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont and Wisconsin. The four volumes, with over 1,200 maps, describe over 5,000 specific sites. Each volume includes over 300 to-scale maps marked with over 1,000 collecting sites and detailed directions on getting there, the types of rocks, minerals and fossils to be found at each site, and how and where to search once you've arrived.