* Great for kids, families, educators, and amateur naturalists * Waterproof and transportable for use in the field * Created by a high-school science teacher More than 1 million Mac's Field Guides have been sold — in part because they're so easy to carry and use. This one is great for carrying through the tide pools and identifing what you find there. Keep them handy for extra fun at the beach. Mac's Field Guides are the perfect wildlife identification tool for the amateur naturalist, covering a wide variety of subjects and regions in North America.