Underworld: Exploring the Secret World Beneath Your Feet

This book is fun but it is super long. It has a lot of things to learn, all about underground. It talks about rocks that make up the earth, and caves. Fossils, diamonds, underground cities. Different animals live in the ground. There are shrimp, spiders, and a type of lizard that live in caves, as well as bats. It talks about tombs and burial mounds, like the tomb in China that had a ton of clay soldiers. Buried treasure, torture mounds, trenches for wars, and mining for gold, oil, and coal. There are cities that are underground and there’s crocodiles in the sewers. And it talks about people on Mars who could live underground. They could make a city with gardens and everything they needed. In Japan people have underground things like that. The Mars part is my favorite part. I liked reading about the torture chambers, where people were tortured and killed. There is a lot of information about caves and underground stuff and sinkholes. There is a place underneath Paris full of skulls and bones. This book has a lot to read.