Two bestselling book creators bring prehistoric sea beasts to life in this spectacular pop-up masterpiece! While dinosaurs patrolled the lands, massive prehistoric sharks, giant scorpions and colossal squid cruised the ancient oceans - most with just one thing in mind: eat or be eaten. Full of captivating facts and more than thirty-five breathtaking pop-ups, this incredible companion volume to the bestselling Encyclopedia Prehistorica: Dinosaurs explores the prehistoric underwater world, where monsters ruled the waves for millions of years.