The Boxcar Children are going on vacation to Dragon's Mouth Cavern. The four Aldens like rock hunting in the area, until Benny finds a sinkhole that leads to the underground caves. While exploring the caves, they realize that someone doesn't want them there. But why?
Can the Boxcar Children solve this new underground mystery?
©1995 Albert Whitman & Co. (P)2014 Oasis Audio
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