Just when you thought it was safe to go in the water! The second astonishing ENCYCLOPEDIA PREHISTORICA book from Robert Sabuda and Matthew Reinhart is about to pop up everywhere. 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. In this companion volume to the best-selling ENCYCLOPEDIA PREHISTORICA: DINOSAURS, pop-up masters Robert Sabuda and Matthew Reinhart explore the prehistoric underwater world, where monsters like megalodon ruled the waves.