Discover the rich biodiversity of Earth's biomes - and how they might be saved - with this STEAM-based subset of True Books. Did you know that it stays dark, 24-hours-a-day, for months at a time in the tundra? This frigid biome also has permanently frozen ground! Get ready to investigate some of Earth's most unforgiving ecosystems, as well as the plants and animals that have adapted to survive in them. You'll also learn about the many threats facing this fascinating biome - and what each of us can do to help - all in the pages of Tundra in Danger.