Level J reading level. Our planet Earth has a great diversity of ecosystems, both beautiful and dangerous.Would you want to visit the wildest places left on Earth, even with the dangers of wild animals and harsh climates? Through these books, follow the adventures of child explorers as they travel through the world's biomes. Visit a Temperate Forest, a Desert, a Prairie, a Rainforest, a Coral Reef and a Wetland. Written by Bridget Heos.