Are you brave enough to delve into the chilling darkness of... THE DEEP? With no light, no heat and miles of sea above you, it might be the strangest, most extreme place on Earth. So, climb inside the submersible and plunge deep down beneath the sunlit surface where you'll discover disturbing and unusual creatures, explore alien-looking worlds and visit the deepest place in the entire ocean, all in this weird and wonderful flap book.

Chapters in this book include:
- The Deep
- Journey to the Deep
- The Twilight Zone
- The Midnight Zone
- Dark Clouds
- The Abyss
- Whale Fall
- Stranger Places
- The Deepest Place on Earth
- A Sea of Fireworks
- How Deep is the Deep?