BioFables: Book 3, Series 1Ages 10-adultWhat's cooler than a geodesic tent? Igloos (They have the same basic overall shape). Also cool: learning that the straight lines of their family tent's triangles and an igloo's square-ish blocks of snow are arranged to make surfaces that are rounded.What's hot? Climbing sand dunes in summer. Mallory's seven-year-old twin sister, Melody, enjoys the heat. Mallory? Not so much. He and his Dad head back down the...