* Durable, inexpensive, fun to use nature identification guide * Great for families, hikers, and park visitors * Created by a high-school science teacher This field guide for Northern California wildflowers is easy to toss in the car or slip into your pack. They are tough and waterproof. No matter the weather or terrain, 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. More than 1 million Mac's Guides have been sold!