Prehistoric Sea Monsters (National Geographic Kids Readers, Level 2)By: National Geographic Kids Series: National Geographic Kids Readers Meet Megalodon and more of the biggest, coolest, and creepiest marine animals from the prehistoric era! Teeth, tails, and scalesoh my! Newly independent readers will be transported back to a time when bugs were big and monsters ruled the deep. Each page of this dazzling Level 2 reader is packed with jaw dropping facts on the fiercest predators of the ancient oceans. Learn about