On Earth Day 2013: 13 excellent books to consume

It's Earth Day. Check out these 13 books for the literary equivalent of a green boost of antioxidants and protein.

10. "A Walk in the Woods," by Bill Bryson

For some reason, Bill Bryson decided to walk the 2,100 mile Appalachian Trail. For some other reason, he decided to bring his now infamous friend Stephen Katz along with him. Somewhere between beautiful vistas, snakes, and the treachery of the trail, Bryson finds humor, as is his wont. "A Walk in the Woods" is a modern classic travelogue.

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