Shop › Sam Thayer's Field Guide to Edible Wild Plants (Used) Image 1 of 5 Image 2 of 5 Image 3 of 5 Image 4 of 5 Image 5 of 5 Sam Thayer's Field Guide to Edible Wild Plants (Used) $25.00 This is one of the most complete guides to wild plants in Eastern North America. Add To Cart Added! This is one of the most complete guides to wild plants in Eastern North America.