Underworld: Exploring the Secret World Beneath Your Feet

With the intriguing idea of exploring what lies below the surface of the Earth as its broad theme, this fascinating book cleverly dices up the subject into small, more manageable pieces ready to be devoured by young readers, particularly boys. The basics are covered in detail, such as the physical properties of the Earth’s crust (including its unusual features such as volcanoes and caves), as well as animals with underground habitats.