Clue at the Bottom of the Lake

"It's the middle of the night when Jeff spots someone dumping a large bundle into the lake. It's too dark to identify anyone -- or anything. But the cousins immediately suspect foul play, and plunge right into the mystery. Before they know it, the kids of Cabin Creek are in too deep. Everyone is a suspect -- and the cousins are all in danger!"--P. [4] of cover.