What lies beneath the earth and at the bottom of the oceans? This flip book confidently guides us through unknown worlds. Aleksandra and Daniel Mizielinski have once again pulled off a remarkable feat: they take us to realms that almost no one ventures into: beneath the earth and deep into the water! What they show us there is spectacular: gold mines in South Africa, the underwater world beneath oil rigs, volcanic eruptions, giant isopods, ghost fish, and three-meter-long earthworms. They take us to excavations and sewage systems, and they know that the deepest subway in the world operates in North Korea. A book that impresses from top to bottom with its graphic design and attention to detail, clearly possessing classic potential. Additionally, as a true flip book, it features two titles.