Christina and Grant are headed up the Mississippi River from New Orleans to meet Sam and Jake in St. Louis who are heading down river from Minnesota, but find themselves embroiled in a mystery that takes them over locks and dams and past Tom Sawyer's cave.
Series:
Carole Marsh mysteries ; #14 Real kids, real places Marsh, Carole. Carole Marsh mysteries ; #14. Marsh, Carole. Real kids, real places.
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