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It deals with just about every aspect of nature all at a very easy to read level for either the casual stroller to the serious student. So you can gather walk along and enjoy knowing what things are actually learn about a certain plants or animals. This is really fun book I take it along on road trips with my kids and have a blast at the beach collecting pill bugs and burrowing ghost shrimp. Now that I know there names I can tell everyone what they are.
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The maps though, don't say what the major highways/roads are, so you'll need another map. I have the book Roadside Geology of North/Central California, and this book goes really well with it.
In some ways, Rocks and Minerals of California I think is more useful, despite the missing road ID. The book has sections of counties (not all but most) and minerals found in those areas. Also, quadrangle information, township/range locations of minerals is listed.
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