Dive deep into ancient oceans where colossal predators and terrifying beasts ruled the dark waters. Long before humans sailed the seas, the underwater world was a dangerous place filled with massive prehistoric sharks, giant scorpions, and enormous squids. In this thrilling underwater expedition, you will come face to face with a megalodon whose massive jaws snap right out of the book. This incredible pop-up adventure is packed with mind-blowing facts about the ocean's most fearsome extinct creatures. With dozens of spectacular three-dimensional paper sculptures, you will witness the fierce battles and amazing survival skills of marine monsters. Hidden booklets scattered throughout the pages offer even more interactive surprises and scientific discoveries. Whether you love marine biology or just enjoy a good scare, this visually stunning encyclopedia reveals the mysteries of the prehistoric deep. It will leave you wondering what might still be lurking in the unexplored depths of today's oceans.