What hidden worlds lie beneath your feet? Or in the deepest parts of the ocean, where not even sunlight can reach? Come on a journey to meet glowing deep-sea creatures, zombie-making fungi and the trillions of tiny workers that live inside your own body. But be warned, things can get a little strange in the deep... Deep is an illustrated non-fiction book that explores the places hardest to reach, from the molten depths of our planet to the frigid depths of outer space. Linking seemingly diverse subject matter, it invites the reader to explore worlds hidden from view.