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I’m recalling a book I read in elementary school approximately 1973-74. It was a hardcover mystery with a red cover and the spine had a white section with the title and also an image of a ginseng root. The story involved a group of children/youths exploring a remote wooded area, possibly on a mountain, who found ginseng roots and were collecting them for money. Along the way they stumble across a mystery, although I don’t recall the details of that. I thought the title might be something like “Mystery Back of the Mountain” or something similar, but I haven’t been able to spot it.
In 1974 my 4th grade teacher asked for suggestions to read for class story time, and I suggested the book and it was very popular with my classmates. I’d love to be able to find it again and purchase a copy.