Swim in the murky underwater world with prehistoric creatures who fought for their survival in Age of Ancient Sea Monsters from PNSO Field Guide to the Ancient
A companion volume to the 3-D "Sea Monsters" film reveals the terrifying predators that lurked in the underwater Cretaceous world, in a volume that also profile
Color artwork and detailed captions journey underwater to capture the prehistoric world of an array of extinct animals, in the companion volume to the Discovery
Explore the vast depths of the underwater world from hundreds of millions of years ago, with The Secrets of Ancient Sea Monsters from PNSO Encyclopedia for Chil