Come visit the exciting world beneath our feet, where trains run, pipes flow, and machines hum, as well as where mysterious creatures are thought to have dwelled. Follow people throughout the ages as they navigate underground caverns, excavate ancient tombs, build elaborate cable systems - and much more. With new objects and creatures to find on every fact-filled page, and plenty of sidebars containing fascinating bits of information, this book will delight any young reader who has ever wondered about the mysteries of our world - hidden under the ground.
For ages 8 to 12.
Package Weight: about 14.8 ounces.
(From the Non-Fiction Books shelf.)