Tom Sawyer's Dark Plot

Adventures in Time -- 1849 (Book 2)Bored after their previous adventure, Tom Sawyer concocts a scheme to convince the villagers of St. Petersburg that Bigfoot-type monsters are migrating up the Mississippi River. Tom, Huck, Becky, Jim, and Zane Rasmussen, a teen time-traveler from the 21st century, fake footprints and evidence to claim they've killed one of the monsters on an island and saved the village. Their plot is upstaged when a man is found mauled and huge footprints are discovered. The co-conspirators are chilled to realize they might be dealing with a real monster.