. . . . . . . "\"Tom and Ricky build a tree house next to the creek. What a great place to use when they go fishing. But the fun changes when they find their tree house filled with things. And who are that man and woman? Could they be the ones using it?\"--Page 4 of cover."@en . . . "Readers (Elementary)"@en . . . . . . "Tree house mystery"@en . . . . . "El misterio de la casa-árbol = The tree house mystery"@en . . . . . "Tom and Ricky build a tree house next to a creek, but they soon find that other people are interested in their hideaway."@en . "Tom and Ricky and the tree house mystery"@en . . .